Cannot attach file to issue from scrum board

Summary

When attaching a file to an issue using GG or . and error is thrown

Steps to Reproduce

1. Navigate to board
2. Tap on the issue
3. Use shortcut key: .
4. Type att to get auto completion to find the attach files option
5. Hit enter on the keyboard
6. Choose your file to upload and OK

Expected Results

• File to be attached and receive JIRA notification upload was successful and the file should appear in "Attachments" section.

Steps to reproduce

• Go to a scrum board
• Select an issue
• Press . (for quick actions), type "attach" and select "Attach files"
• Select a file

Actual result

The page stops working and it has to be refreshed.

Workaround

• Attach files by "drag and drop"
• Attach files using any view other than agile board