Cannot Save Files to S3 Within JupyterLab

[traviscancode604]

Describe the bug
While using the extension and creating a new file within an S3 bucket, the file cannot be saved. An error is given:

File Save Error for <filename here>. 
Path must be a string. Received undefined

To Reproduce
Steps to reproduce the behavior:

1. Create new file in S3 bucket through Jupyter Lab (e.g.: test.md).
2. Open and modify the file.
3. Try to save the file.
4. See error Path must be a string. Received undefined error.

Expected behavior
Was expecting to see the file be saved / updated.

Screenshots
N/A

Desktop:

• OS: macOS Monterey Version 12.2
• Browser: Chrome
• Version of jupyterlab-s3-browser extension: 0.12.0
• Version of Jupyter Lab: 3.2.8

Additional context
Thanks!

[wags1999]

I ran into this error as well - but it appears this is what is displayed when Access is Denied to that S3 location. When I try to upload to a bucket that I have permissions to, then it works properly.

[reevejd]

Thank you both for reporting the issue and adding some clarifying details. I'll try to add a useful error message for this situation.