[fix] llm_engine valueerror on completion

Author: DninoAdnane

edenai_apis/llmengine/llm_engine.py

@@ -112,6 +112,8 @@ def _execute_completion(self, params: Dict, response_class: Type, **kwargs):
             raise ProviderException(
                 "An error occurred while parsing the response."
             ) from exc
+        except ValueError as exc_v:
+            raise ProviderException("Provider returned an empty or mal-formatted response") from exc_v
         standardized_response = response_class(**result)
         return ResponseType[response_class](
             original_response=response.to_dict(),