Dave

I created a repeating job dynamically, which worked well. The job started after the given `first_at` time and everything was peachy. The job was persisted, as I wanted it to...

### Current Behavior When following the LangChain instructions from the docs for a custom LLM I'm getting: ``` File "gptcache/processor/pre.py", line 20, in last_content return data.get("messages")[-1]["content"] ~~~~~~~~~~~~~~~~~~~~^^^^ TypeError: 'NoneType' object...