not able to find the error report but when u right click with a advance packenger upgrade and click on any of the buttions in the gui u get crashed with "fatal error"

If this is a client crash, do you have the crash report for us?

client yes crashreport me am still looking cant find any :(

it was a "open to lan" server didt matter who clicked with the upgrade to make the crash

http://docs.mym.li/en/latest/Knowledge_Base/crashreport.html

https://gyazo.com/2d9125ed04076a311a1517a15beb5003
there is no crashreport folder like it woud normaly make after a crash

Duplicate of #7

According to the mod dev it has been fixed: https://bitbucket.org/zyberwax/main/issues/32/upgrade-packager-nullpointerexception

Mod will be updated with the next modpack update.