fix(vertex_httpx.py): add better debug logging for vertex httpx

litellm/llms/vertex_httpx.py

@@ -366,8 +366,12 @@ class VertexLLM(BaseLLM):
 
         ## GET MODEL ##
         model_response.model = model
+
+        try:
             ## GET TEXT ##
-        chat_completion_message: ChatCompletionResponseMessage = {"role": "assistant"}
+            chat_completion_message: ChatCompletionResponseMessage = {
+                "role": "assistant"
+            }
             content_str = ""
             tools: List[ChatCompletionToolCallChunk] = []
             for idx, candidate in enumerate(completion_response["candidates"]):
@@ -414,6 +418,13 @@ class VertexLLM(BaseLLM):
             )
 
             setattr(model_response, "usage", usage)
+        except Exception as e:
+            raise VertexAIError(
+                message="Received={}, Error converting to valid response block={}. File an issue if litellm error - https://github.com/BerriAI/litellm/issues".format(
+                    completion_response, str(e)
+                ),
+                status_code=422,
+            )
 
         return model_response