diff --git a/src/main/kotlin/io/github/mojira/arisa/Executor.kt b/src/main/kotlin/io/github/mojira/arisa/Executor.kt
index bcfd4bdb..b2093cbb 100644
--- a/src/main/kotlin/io/github/mojira/arisa/Executor.kt
+++ b/src/main/kotlin/io/github/mojira/arisa/Executor.kt
@@ -139,7 +139,7 @@ private fun getSearchResultsFromJira(
                     config
                 )
             } catch (exception: Exception) {
-                log.error("Error mapping bug report ${it.key}:" + exception.message + "\n" + exception.stackTrace)
+                log.error("Error mapping bug report ${it.key}", exception)
                 null
             }
         }
diff --git a/src/main/kotlin/io/github/mojira/arisa/infrastructure/jira/Mappers.kt b/src/main/kotlin/io/github/mojira/arisa/infrastructure/jira/Mappers.kt
index 92be6d1e..6faeb083 100644
--- a/src/main/kotlin/io/github/mojira/arisa/infrastructure/jira/Mappers.kt
+++ b/src/main/kotlin/io/github/mojira/arisa/infrastructure/jira/Mappers.kt
@@ -219,7 +219,7 @@ fun JiraComment.toDomain(
     return Comment(
         id,
         body,
-        author.toDomain(jiraClient, config),
+        author?.toDomain(jiraClient, config),
         updateAuthor?.toDomain(jiraClient, config),
         { getGroups(jiraClient, author.name).fold({ null }, { it }) },
         { if (updateAuthor == null) emptyList() else getGroups(jiraClient, updateAuthor.name).fold({ null }, { it }) },