diff --git a/docs/howtos/customizations/_run_config.md b/docs/howtos/customizations/_run_config.md
index b0c66c140a..dd7a9e3475 100644
--- a/docs/howtos/customizations/_run_config.md
+++ b/docs/howtos/customizations/_run_config.md
@@ -1,6 +1,6 @@
-# RunConfig
+# Customize timeouts and rate limits
 
-The `RunConfig` allows you to pass in the run parameters to functions like `evaluate()` and `TestsetGenerator.generate()`. Depending on your LLM providers rate limits, SLAs and traffic, controlling these parameters can improve the speed and reliablility of Ragas runs.
+The `RunConfig` allows you to pass in the run parameters to functions like `evaluate()` and `TestsetGenerator.generate()`. Depending on your LLM providers rate limits, SLAs and traffic, controlling these parameters can improve the speed and reliability and set failure tolerance of Ragas runs.
 
 How to configure the `RunConfig` in
 
diff --git a/src/ragas/callbacks.py b/src/ragas/callbacks.py
index cbfb92b95f..d587e43a41 100644
--- a/src/ragas/callbacks.py
+++ b/src/ragas/callbacks.py
@@ -162,9 +162,11 @@ def parse_run_traces(
             prompt_traces = {}
             for i, prompt_uuid in enumerate(metric_trace.children):
                 prompt_trace = traces[prompt_uuid]
+                output = prompt_trace.outputs.get("output", {})
+                output = output[0] if isinstance(output, list) else output
                 prompt_traces[f"{prompt_trace.name}"] = {
                     "input": prompt_trace.inputs.get("data", {}),
-                    "output": prompt_trace.outputs.get("output", {})[0],
+                    "output": output,
                 }
             metric_traces[f"{metric_trace.name}"] = prompt_traces
         parased_traces.append(metric_traces)