fix: Handle exceptions in the send method of base_coder.py

aider/coders/base_coder.py

@@ -1244,6 +1244,7 @@ class Coder:
 
         self.io.log_llm_history("TO LLM", format_messages(messages))
 
+        completion = None
         try:
             hash_object, completion = send_completion(
                 model.name,
@@ -1263,6 +1264,8 @@ class Coder:
         except KeyboardInterrupt as kbi:
             self.keyboard_interrupt()
             raise kbi
+        except Exception as e:
+            self.io.tool_error(f"Error during API call: {str(e)}")
         finally:
             self.io.log_llm_history(
                 "LLM RESPONSE",