Getting 'internal server error' while running ollama_demo file for lightrag for various smaller models. NEED HELP.

[shalini-agarwal]

INFO:httpx:HTTP Request: POST http://127.0.0.1:11434/api/chat "HTTP/1.1 500 Internal Server Error" ....... ollama._types.ResponseError: POST predict: Post "http://127.0.0.1:52582/completion": EOF

I am trying to run the lightrag_ollama_demo.py file from examples folder in the GitHub repository. I have been constantly getting this error where Ollama encounters an internal server error and stops midway while doing entity extraction. I have tried Llama3.21b, TinyLlama, Phi, Qwen2.5:0.5b with nomic-embed-text, mxbai-embed-large and snowflake-arctic-embed:22m as embedding models. I have tried different combinations of LLM and the embedding models, but I get the same error for all these models. For Qwen, it did work a few times but other times I got this error again. I saw that others also got this error and some suggestions were to change the OLLAMA_KV_CACHE_TYPE to q8_0 and others suggested that after new changes, this error has been fixed. I tried changing the KV value to q8_0 through this command - launchctl setenv OLLAMA_KV_CACHE_TYPE q8_0 in my terminal but even that didn't work. And I pulled all the recent changes only day before yesterday but I am still getting this error.
Here is my Ollama log if that helps -