SUMMARY STEPS TO REPRODUCE 1. Download 21.08.0b appImage from the official site 2. Make it executable 3. Launch it 4. If it's not the first run, just click on "Settings" → Configure Wizard OBSERVED RESULT Startup wizard says package Frei0r (frei0r-plugins) is missing EXPECTED RESULT The application starts as always SOFTWARE/OS VERSIONS appImage 21.08.0b on Ubuntu 20.04 ADDITIONAL INFORMATION Anyway, it looks like frei0r plugins are present and usable. It's just a wrong warning, maybe? Being an appimage, this happens with or without the installation of frei0r plugins in Ubuntu.
Thank you for reporting. I can confirm this issue. That should not happen. It seems a packaging miss.
Thanks for your report! I am closing this because 21.08.1 is out since a while and should fix this problem, please try again and reopen if it is not fixed.