diff --git a/build.gradle b/build.gradle
index f8d7245d..2caed6f4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ plugins {
 }
 
 group 'com.shuzijun.leetcode'
-version "6.1" + (project.build_env.isEmpty() ? "" : "-") + project.build_env
+version "6.2" + (project.build_env.isEmpty() ? "" : "-") + project.build_env
 
 sourceCompatibility = 1.8
 targetCompatibility = 1.8
diff --git a/src/main/java/com/shuzijun/leetcode/plugin/actions/AbstractTimeAction.java b/src/main/java/com/shuzijun/leetcode/plugin/actions/AbstractTimeAction.java
new file mode 100644
index 00000000..e470ef85
--- /dev/null
+++ b/src/main/java/com/shuzijun/leetcode/plugin/actions/AbstractTimeAction.java
@@ -0,0 +1,42 @@
+package com.shuzijun.leetcode.plugin.actions;
+
+import com.intellij.openapi.actionSystem.AnActionEvent;
+import com.intellij.openapi.actionSystem.PlatformDataKeys;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.openapi.wm.WindowManager;
+import com.shuzijun.leetcode.plugin.manager.ViewManager;
+import com.shuzijun.leetcode.plugin.model.Config;
+import com.shuzijun.leetcode.plugin.model.LeetcodeEditor;
+import com.shuzijun.leetcode.plugin.model.Question;
+import com.shuzijun.leetcode.plugin.setting.ProjectConfig;
+import com.shuzijun.leetcode.plugin.timer.TimerBarWidget;
+import com.shuzijun.leetcode.plugin.utils.MessageUtils;
+import com.shuzijun.leetcode.plugin.utils.PropertiesUtils;
+
+/**
+ * @author shuzijun
+ */
+public abstract class AbstractTimeAction extends AbstractAsynAction {
+
+    @Override
+    public void perform(AnActionEvent anActionEvent, Config config) {
+        VirtualFile vf = anActionEvent.getData(PlatformDataKeys.VIRTUAL_FILE);
+        LeetcodeEditor leetcodeEditor = ProjectConfig.getInstance(anActionEvent.getProject()).getEditor(vf.getPath());
+        if (leetcodeEditor == null) {
+            return;
+        }
+        Question question = ViewManager.getQuestionById(leetcodeEditor.getQuestionId(), anActionEvent.getProject());
+        if (question == null) {
+            MessageUtils.getInstance(anActionEvent.getProject()).showInfoMsg("info", PropertiesUtils.getInfo("tree.null"));
+            return;
+        }
+        TimerBarWidget timerBarWidget = (TimerBarWidget) WindowManager.getInstance().getStatusBar(anActionEvent.getProject()).getWidget(TimerBarWidget.ID);
+        if (timerBarWidget != null) {
+            perform(anActionEvent, config, timerBarWidget, question);
+        } else {
+            //For possible reasons, the IDE version is not supported
+        }
+    }
+
+    public abstract void perform(AnActionEvent anActionEvent, Config config, TimerBarWidget timerBarWidget, Question question);
+}
diff --git a/src/main/java/com/shuzijun/leetcode/plugin/actions/EditorMenuActionGroup.java b/src/main/java/com/shuzijun/leetcode/plugin/actions/EditorMenuActionGroup.java
index 7d4d16fb..17b1b2aa 100644
--- a/src/main/java/com/shuzijun/leetcode/plugin/actions/EditorMenuActionGroup.java
+++ b/src/main/java/com/shuzijun/leetcode/plugin/actions/EditorMenuActionGroup.java
@@ -15,10 +15,12 @@ public class EditorMenuActionGroup extends DefaultActionGroup {
     @Override
     public void update(AnActionEvent e) {
         VirtualFile vf = e.getData(PlatformDataKeys.VIRTUAL_FILE);
-        LeetcodeEditor leetcodeEditor = ProjectConfig.getInstance(e.getProject()).getEditor(vf.getPath());
         boolean menuAllowed = false;
-        if (leetcodeEditor != null) {
-            menuAllowed = true;
+        if (vf != null) {
+            LeetcodeEditor leetcodeEditor = ProjectConfig.getInstance(e.getProject()).getEditor(vf.getPath());
+            if (leetcodeEditor != null) {
+                menuAllowed = true;
+            }
         }
         e.getPresentation().setEnabledAndVisible(menuAllowed);
     }
diff --git a/src/main/java/com/shuzijun/leetcode/plugin/actions/FindAction.java b/src/main/java/com/shuzijun/leetcode/plugin/actions/FindAction.java
index 004723f7..8b1b67ec 100644
--- a/src/main/java/com/shuzijun/leetcode/plugin/actions/FindAction.java
+++ b/src/main/java/com/shuzijun/leetcode/plugin/actions/FindAction.java
@@ -15,6 +15,10 @@ public class FindAction extends ToggleAction {
 
     @Override
     public boolean isSelected(AnActionEvent anActionEvent) {
+        if (anActionEvent.getProject() == null) {
+            //Why is it null?
+            return false;
+        }
         JPanel panel = WindowFactory.getDataContext(anActionEvent.getProject()).getData(DataKeys.LEETCODE_PROJECTS_TERRFIND);
         if (panel == null) {
             return false;
diff --git a/src/main/java/com/shuzijun/leetcode/plugin/actions/ResetTimeAction.java b/src/main/java/com/shuzijun/leetcode/plugin/actions/ResetTimeAction.java
index 6a6ec04c..359fb427 100644
--- a/src/main/java/com/shuzijun/leetcode/plugin/actions/ResetTimeAction.java
+++ b/src/main/java/com/shuzijun/leetcode/plugin/actions/ResetTimeAction.java
@@ -1,17 +1,16 @@
 package com.shuzijun.leetcode.plugin.actions;
 
 import com.intellij.openapi.actionSystem.AnActionEvent;
-import com.intellij.openapi.wm.WindowManager;
 import com.shuzijun.leetcode.plugin.model.Config;
+import com.shuzijun.leetcode.plugin.model.Question;
 import com.shuzijun.leetcode.plugin.timer.TimerBarWidget;
 
 /**
  * @author shuzijun
  */
-public class ResetTimeAction extends AbstractAsynAction {
+public class ResetTimeAction extends AbstractTimeAction {
     @Override
-    public void perform(AnActionEvent anActionEvent, Config config) {
-        TimerBarWidget timerBarWidget = (TimerBarWidget) WindowManager.getInstance().getStatusBar(anActionEvent.getProject()).getWidget(TimerBarWidget.ID);
+    public void perform(AnActionEvent anActionEvent, Config config, TimerBarWidget timerBarWidget, Question question) {
         timerBarWidget.reset();
     }
 }
diff --git a/src/main/java/com/shuzijun/leetcode/plugin/actions/StartTimeAction.java b/src/main/java/com/shuzijun/leetcode/plugin/actions/StartTimeAction.java
index 4d8d2e70..5ff4dd3a 100644
--- a/src/main/java/com/shuzijun/leetcode/plugin/actions/StartTimeAction.java
+++ b/src/main/java/com/shuzijun/leetcode/plugin/actions/StartTimeAction.java
@@ -1,28 +1,16 @@
 package com.shuzijun.leetcode.plugin.actions;
 
 import com.intellij.openapi.actionSystem.AnActionEvent;
-import com.intellij.openapi.wm.WindowManager;
-import com.shuzijun.leetcode.plugin.manager.ViewManager;
 import com.shuzijun.leetcode.plugin.model.Config;
 import com.shuzijun.leetcode.plugin.model.Question;
 import com.shuzijun.leetcode.plugin.timer.TimerBarWidget;
-import com.shuzijun.leetcode.plugin.utils.DataKeys;
-import com.shuzijun.leetcode.plugin.window.WindowFactory;
-
-import javax.swing.*;
 
 /**
  * @author shuzijun
  */
-public class StartTimeAction extends AbstractAsynAction {
+public class StartTimeAction extends AbstractTimeAction {
     @Override
-    public void perform(AnActionEvent anActionEvent, Config config) {
-        JTree tree = WindowFactory.getDataContext(anActionEvent.getProject()).getData(DataKeys.LEETCODE_PROJECTS_TREE);
-        Question question = ViewManager.getTreeQuestion(tree, anActionEvent.getProject());
-        if (question == null) {
-            return;
-        }
-        TimerBarWidget timerBarWidget = (TimerBarWidget) WindowManager.getInstance().getStatusBar(anActionEvent.getProject()).getWidget(TimerBarWidget.ID);
-        timerBarWidget.startTimer(question.getTitle());
+    public void perform(AnActionEvent anActionEvent, Config config, TimerBarWidget timerBarWidget, Question question) {
+        timerBarWidget.reset();
     }
 }
diff --git a/src/main/java/com/shuzijun/leetcode/plugin/actions/StopTimeAction.java b/src/main/java/com/shuzijun/leetcode/plugin/actions/StopTimeAction.java
index 695513ea..96fd12fa 100644
--- a/src/main/java/com/shuzijun/leetcode/plugin/actions/StopTimeAction.java
+++ b/src/main/java/com/shuzijun/leetcode/plugin/actions/StopTimeAction.java
@@ -1,17 +1,16 @@
 package com.shuzijun.leetcode.plugin.actions;
 
 import com.intellij.openapi.actionSystem.AnActionEvent;
-import com.intellij.openapi.wm.WindowManager;
 import com.shuzijun.leetcode.plugin.model.Config;
+import com.shuzijun.leetcode.plugin.model.Question;
 import com.shuzijun.leetcode.plugin.timer.TimerBarWidget;
 
 /**
  * @author shuzijun
  */
-public class StopTimeAction extends AbstractAsynAction {
+public class StopTimeAction extends AbstractTimeAction {
     @Override
-    public void perform(AnActionEvent anActionEvent, Config config) {
-        TimerBarWidget timerBarWidget = (TimerBarWidget) WindowManager.getInstance().getStatusBar(anActionEvent.getProject()).getWidget(TimerBarWidget.ID);
-        timerBarWidget.stopTimer();
+    public void perform(AnActionEvent anActionEvent, Config config, TimerBarWidget timerBarWidget, Question question) {
+        timerBarWidget.reset();
     }
 }
diff --git a/src/main/java/com/shuzijun/leetcode/plugin/actions/editor/ResetTimeAction.java b/src/main/java/com/shuzijun/leetcode/plugin/actions/editor/ResetTimeAction.java
index b64ec93e..468fe169 100644
--- a/src/main/java/com/shuzijun/leetcode/plugin/actions/editor/ResetTimeAction.java
+++ b/src/main/java/com/shuzijun/leetcode/plugin/actions/editor/ResetTimeAction.java
@@ -1,36 +1,17 @@
 package com.shuzijun.leetcode.plugin.actions.editor;
 
 import com.intellij.openapi.actionSystem.AnActionEvent;
-import com.intellij.openapi.actionSystem.PlatformDataKeys;
-import com.intellij.openapi.vfs.VirtualFile;
-import com.intellij.openapi.wm.WindowManager;
-import com.shuzijun.leetcode.plugin.actions.AbstractAsynAction;
-import com.shuzijun.leetcode.plugin.manager.ViewManager;
+import com.shuzijun.leetcode.plugin.actions.AbstractTimeAction;
 import com.shuzijun.leetcode.plugin.model.Config;
-import com.shuzijun.leetcode.plugin.model.LeetcodeEditor;
 import com.shuzijun.leetcode.plugin.model.Question;
-import com.shuzijun.leetcode.plugin.setting.ProjectConfig;
 import com.shuzijun.leetcode.plugin.timer.TimerBarWidget;
-import com.shuzijun.leetcode.plugin.utils.MessageUtils;
-import com.shuzijun.leetcode.plugin.utils.PropertiesUtils;
 
 /**
  * @author shuzijun
  */
-public class ResetTimeAction extends AbstractAsynAction {
+public class ResetTimeAction extends AbstractTimeAction {
     @Override
-    public void perform(AnActionEvent anActionEvent, Config config) {
-        VirtualFile vf = anActionEvent.getData(PlatformDataKeys.VIRTUAL_FILE);
-        LeetcodeEditor leetcodeEditor = ProjectConfig.getInstance(anActionEvent.getProject()).getEditor(vf.getPath());
-        if (leetcodeEditor == null) {
-            return;
-        }
-        Question question = ViewManager.getQuestionById(leetcodeEditor.getQuestionId(), anActionEvent.getProject());
-        if (question == null) {
-            MessageUtils.getInstance(anActionEvent.getProject()).showInfoMsg("info", PropertiesUtils.getInfo("tree.null"));
-            return;
-        }
-        TimerBarWidget timerBarWidget = (TimerBarWidget) WindowManager.getInstance().getStatusBar(anActionEvent.getProject()).getWidget(TimerBarWidget.ID);
+    public void perform(AnActionEvent anActionEvent, Config config, TimerBarWidget timerBarWidget, Question question) {
         timerBarWidget.reset();
     }
 }
diff --git a/src/main/java/com/shuzijun/leetcode/plugin/actions/editor/StartTimeAction.java b/src/main/java/com/shuzijun/leetcode/plugin/actions/editor/StartTimeAction.java
index a5b5b195..793c0157 100644
--- a/src/main/java/com/shuzijun/leetcode/plugin/actions/editor/StartTimeAction.java
+++ b/src/main/java/com/shuzijun/leetcode/plugin/actions/editor/StartTimeAction.java
@@ -1,36 +1,17 @@
 package com.shuzijun.leetcode.plugin.actions.editor;
 
 import com.intellij.openapi.actionSystem.AnActionEvent;
-import com.intellij.openapi.actionSystem.PlatformDataKeys;
-import com.intellij.openapi.vfs.VirtualFile;
-import com.intellij.openapi.wm.WindowManager;
-import com.shuzijun.leetcode.plugin.actions.AbstractAsynAction;
-import com.shuzijun.leetcode.plugin.manager.ViewManager;
+import com.shuzijun.leetcode.plugin.actions.AbstractTimeAction;
 import com.shuzijun.leetcode.plugin.model.Config;
-import com.shuzijun.leetcode.plugin.model.LeetcodeEditor;
 import com.shuzijun.leetcode.plugin.model.Question;
-import com.shuzijun.leetcode.plugin.setting.ProjectConfig;
 import com.shuzijun.leetcode.plugin.timer.TimerBarWidget;
-import com.shuzijun.leetcode.plugin.utils.MessageUtils;
-import com.shuzijun.leetcode.plugin.utils.PropertiesUtils;
 
 /**
  * @author shuzijun
  */
-public class StartTimeAction extends AbstractAsynAction {
+public class StartTimeAction extends AbstractTimeAction {
     @Override
-    public void perform(AnActionEvent anActionEvent, Config config) {
-        VirtualFile vf = anActionEvent.getData(PlatformDataKeys.VIRTUAL_FILE);
-        LeetcodeEditor leetcodeEditor = ProjectConfig.getInstance(anActionEvent.getProject()).getEditor(vf.getPath());
-        if (leetcodeEditor == null) {
-            return;
-        }
-        Question question = ViewManager.getQuestionById(leetcodeEditor.getQuestionId(), anActionEvent.getProject());
-        if (question == null) {
-            MessageUtils.getInstance(anActionEvent.getProject()).showInfoMsg("info", PropertiesUtils.getInfo("tree.null"));
-            return;
-        }
-        TimerBarWidget timerBarWidget = (TimerBarWidget) WindowManager.getInstance().getStatusBar(anActionEvent.getProject()).getWidget(TimerBarWidget.ID);
+    public void perform(AnActionEvent anActionEvent, Config config, TimerBarWidget timerBarWidget, Question question) {
         timerBarWidget.startTimer(question.getTitle());
     }
 }
diff --git a/src/main/java/com/shuzijun/leetcode/plugin/actions/editor/StopTimeAction.java b/src/main/java/com/shuzijun/leetcode/plugin/actions/editor/StopTimeAction.java
index 0e939ebe..16cee06b 100644
--- a/src/main/java/com/shuzijun/leetcode/plugin/actions/editor/StopTimeAction.java
+++ b/src/main/java/com/shuzijun/leetcode/plugin/actions/editor/StopTimeAction.java
@@ -1,36 +1,17 @@
 package com.shuzijun.leetcode.plugin.actions.editor;
 
 import com.intellij.openapi.actionSystem.AnActionEvent;
-import com.intellij.openapi.actionSystem.PlatformDataKeys;
-import com.intellij.openapi.vfs.VirtualFile;
-import com.intellij.openapi.wm.WindowManager;
-import com.shuzijun.leetcode.plugin.actions.AbstractAsynAction;
-import com.shuzijun.leetcode.plugin.manager.ViewManager;
+import com.shuzijun.leetcode.plugin.actions.AbstractTimeAction;
 import com.shuzijun.leetcode.plugin.model.Config;
-import com.shuzijun.leetcode.plugin.model.LeetcodeEditor;
 import com.shuzijun.leetcode.plugin.model.Question;
-import com.shuzijun.leetcode.plugin.setting.ProjectConfig;
 import com.shuzijun.leetcode.plugin.timer.TimerBarWidget;
-import com.shuzijun.leetcode.plugin.utils.MessageUtils;
-import com.shuzijun.leetcode.plugin.utils.PropertiesUtils;
 
 /**
  * @author shuzijun
  */
-public class StopTimeAction extends AbstractAsynAction {
+public class StopTimeAction extends AbstractTimeAction {
     @Override
-    public void perform(AnActionEvent anActionEvent, Config config) {
-        VirtualFile vf = anActionEvent.getData(PlatformDataKeys.VIRTUAL_FILE);
-        LeetcodeEditor leetcodeEditor = ProjectConfig.getInstance(anActionEvent.getProject()).getEditor(vf.getPath());
-        if (leetcodeEditor == null) {
-            return;
-        }
-        Question question = ViewManager.getQuestionById(leetcodeEditor.getQuestionId(), anActionEvent.getProject());
-        if (question == null) {
-            MessageUtils.getInstance(anActionEvent.getProject()).showInfoMsg("info", PropertiesUtils.getInfo("tree.null"));
-            return;
-        }
-        TimerBarWidget timerBarWidget = (TimerBarWidget) WindowManager.getInstance().getStatusBar(anActionEvent.getProject()).getWidget(TimerBarWidget.ID);
+    public void perform(AnActionEvent anActionEvent, Config config, TimerBarWidget timerBarWidget, Question question) {
         timerBarWidget.stopTimer();
     }
 }
diff --git a/src/main/resources/META-INF/plugin.xml b/src/main/resources/META-INF/plugin.xml
index 598e1add..c213800a 100644
--- a/src/main/resources/META-INF/plugin.xml
+++ b/src/main/resources/META-INF/plugin.xml
@@ -1,7 +1,7 @@
 <idea-plugin>
     <id>leetcode-editor</id>
     <name>leetcode editor</name>
-    <version>6.1</version>
+    <version>6.2</version>
     <vendor email="shuzijun0109@gmail.com" url="https://github.com/shuzijun/idea-leetcode-plugin">shuzijun</vendor>
 
     <description><![CDATA[
@@ -113,6 +113,16 @@
 
     <change-notes><![CDATA[
          <ul>
+             <li>v6.2<br>
+               1.修复计时器显示错误.<br>
+               2.修复提交问题时异常.<br>
+               3.修复IDE低版本部分功能不支持出现异常<br>
+            </li>
+            <li>v6.2<br>
+               1.fix wrong minute elapsed of timer.<br>
+               2.Fix the submit failure prompt.<br>
+               3.Fix IDE low version exception<br>
+            </li>
            <li>v6.1<br>
                1.增加 Editor 右键菜单.<br>
                2.增加 Bash SQL 支持.<br>