hyper links fail when referencing large document

[jburos]

e.g. :

Here is the error message (which is pretty helpful):

Request failed for https://api.github.com/repos[....].ipynb?ref=explore-mutations returned code 403. Truncated server response: {"message":"This API returns blobs up to 1 MB in size. The requested blob is too large to fetch via the API, but you can use the Git Data API to re... (use muteHttpExceptions option to examine full response)

Not urgent -- for now I will create a shorter notebook. But I wanted to note this here in the meantime