Can't Copy Objects without python-uniconverter warning

Summary:

Can't copy objects; i.e., Ctrl+C produces an error.

Steps to reproduce:

• open Inkscape
• Create an object (e.g., a circle)
• Select it
• Ctrl+C

What happened?

Error message: python uniconverter is missing.

What should have happened?

Should have copied the object to clipboard.

Sample attachments:

This has been discussed at https://askubuntu.com/questions/1222832/how-can-i-install-the-package-python-uniconverter-under-ubuntu-19-10/1339033#1339033

Even after installing Python uniconverter, I still can't copy objects, although the error message has changed to that reported by user1001678 in the above askubuntu.com discussion.

Version Info:

- Inkscape Version: 0.92 
- Operating System: Lubuntu 20.04.2