I have same issue. tried all the steps in the error code, but nothing helps. i can confirm that using names, from preious (successfull) runs lead to correct images (so assumption cache most likely true) but after changing the names, same rendering error occurs. Here is my error text (only the last few lines): ValueError: Failed to reach https://mermaid.ink/ API while trying to render your graph after 1 retries. To resolve this issue:

1. Check your internet connection and try again
2. Try with higher retry settings: draw_mermaid_png(..., max_retries=5, retry_delay=2.0)
3. Use the Pyppeteer rendering method which will render your graph locally in a browser: draw_mermaid_png(..., draw_method=MermaidDrawMethod.PYPPETEER)

I am running the command "jupyter notebook" and using the jupyter notebooks from the langchain academy (the langgraph course), so it should work.

I also searched internet, but it seems that this error is pretty new.