Issue uploading datasets to OpenML

[hildeweerts]

The upload webpage seems to be broken

Originally posted by @romanlutz in https://github.com/fairlearn/fairlearn/issues/1165#issuecomment-1532700789

@romanlutz could you perhaps elaborate on the issues you encountered trying to upload the dataset?

[joaquinvanschoren]

@prabhant can you follow up on this? Thanks!