I had the exact same issue in my brief kobold testing with the class schedule. It kept refusing to generate unique class IDs for each class, that's why it kept failing for me. I think it's a model intelligence issue unfortunately, I was using a 24b model.
And yes, koboldcpp is a little weird with context length, the "context size" you set when you open koboldcpp has to be enough to handle both input and output tokens, so the "max_tokens/length" setting in venus must be set to less than that. Basically, context > max_tokens + input tokens.
Oh, and I wouldn't worry about koboldcpp when it says something like Generating[1/12000] tokens or something, that's just reporting the max content length, usually it ends early before it gets there
Viewing post in v0.0.1 - Known Bugs, feedback, suggestions
That is really weird. It should detect your GPU automatically. I would double check whether this is an issue with the game or with ComfyUI. You can manually run ComfyUI by going to data/services/comfyui/ and click run_nvidia_gpu_bat. It should open a GUI in your browser, drag in the following workflow:
https://github.com/venus-uni-dev/venus-uni-comfyui
And click run. You should be able to run it without having to download any of the models since it'll find the ones you downloaded through the game. The outputs should appear in data/services/comfyui/ComfyUI/output
If it's still not using your GPU there, I'd look up online about your GPU and ComfyUI and see if anyone else is having similar issues