I don't know what my players were doing to trigger this

http://paste.ubuntu.com/p/hHMZkQrgT9/

version: 1.12.2-1.10.17
pack: World of Dragons (mine)
MC VERSION: 1.12.2-14.23.5.2836

Does this happen 'often'? If so, this happened on someone connecting to the server, so maybe try nailing down who this could be - should it be a somewhat smaller server - and try to replicate this.

Should it be somewhat reproducible, please do consider turning on perk logging (astralsorcery.cfg -> general -> debug_logging -> PERKS) and then do this again. The log will then contain essential information that'll help me greatly fixing this...

There is nothing mechanical for patreons. All patreon effects are untied to any other AS system, and purely decorative.

I think I have a similar error going on. It happens every time I try to Log in, It brings the server down.
https://pastebin.com/s7xZFdfw

@kreezxil See hellfire's instructions above

Just a note, ChakatSilverpaw's crash log is from their client, not the server, however, the server goes down with the same crash log, but which crashes first seems random, but both make the same stack (they play on my server so im the one now dealing with how to clean up the crash). Ill run the server with debug logging enabled and past the logs for that in a bit.

Ok, this was a weird one, fired up the server with debug logging enabled like asked, had silverpaw try to connect, they did, but were dead on logging in, they tried to respawn but it wouldnt let the, but each time they tried, the server spat out the same callstack but didnt crash. Stopped the server then collected the log file and here it is, hope this helps.

latest.zip

Thank you very much, yes!

7% movement speed, 7% reach, I beleive.

if wanted, i can package up the world folder and send it if it will help any

Yes i found the exact issue. Will fix this reasonably soon.
Thank you very much, this helped a great deal!

Is it possible to get to know what modifiers the gem has that Chakatsilverpaw has in the gem socket?