Problems with linux install of SNAP version 8.0

Do you use CephFS? This could be an issue.

Or you don’t have write access to the .snap directory in your user_home for some other reason.
At least the message that colour palettes could not be installed sounds like this.

It could be helpful if you attach the log file here:
https://senbox.atlassian.net/wiki/spaces/SNAP/pages/1898053693/SNAP+FAQs#What-to-include-in-a-forum-post-when-reporting-an-issue%3F