Disable (Neo)Forge Processor Hashes Check)
This workaround will ignore the processor hashes checks for Forge and NeoForge. This is currently only a known issue with Fedora Linux using a specific fork of zlib (zlib-ng).
Disabling the processor hashes check
- Open the FTB App
- Click on the settings icon in the sidebar
- Click on
Advanced
in the sidebar of the settings page - Enable the
Ignore (Neo)Forge processor hashes checks
option