If 7 of these don't help then Idk what will. You have 60+ issues...

crash-2020-09-02_14.25.58-client.txt
crash-2020-09-02_14.35.07-client.txt
crash-2020-09-02_14.36.35-client.txt
crash-2020-09-02_12.15.05-server.txt
crash-2020-09-02_12.17.19-client.txt
crash-2020-09-02_12.17.20-client.txt
crash-2020-09-02_12.45.04-client.txt

If you need the logs for whatever reason then here ya go.
latest.log

Logs are not "for whatever reason". And given it seems to work fine for most people it's definatly a compat issue. IDK if it's on JEID's side or another mods. Having 60+ open issues is perfectly normal, look at some other mods bug trackers.

EDIT: @EnderBro123 Seems to be an issue with Twighlight Forest. Try updating that.
EDIT 2: It's a good idea to provide a list of mods and their versions, so people can try to reproduce it. If they can't do that it's very hard to solve.

Logs are not "for whatever reason". And given it seems to work fine for most people it's definatly a compat issue. IDK if it's on JEID's side or another mods. Having 60+ open issues is perfectly normal, look at some other mods bug trackers.

EDIT: @EnderBro123 Seems to be an issue with Twighlight Forest. Try updating that.
EDIT 2: It's a good idea to provide a list of mods and their versions, so people can try to reproduce it. If they can't do that it's very hard to solve.

Mods n' such are in the report files. Say thanks to Forge for that.
Twilight Forest only has 2 1.12 versions and I bet they wouldn't fix the issue. Tried both and same issue.