see log:

crash-2020-02-03_11.11.35-client.txt

This is a Bonsai Trees issue, so I've moved it from libnonymous over here.
Since I am unable to reproduce this, would you mind retesting it with the latest build 2.1.2.7 from here? Thanks!

I have the same Issue if i use this Mod in combination with dank storage.

Getting Same Error With 1.14.4 Version

https://paste.link/p2/2APsDSBWn2WWWkFroxOhJQ.txt

i was getting the original error that was reported with 2.1.2.6 and am now getting this error https://pastebin.com/jHjq2FRd with 2.1.2.7

oh and this is not just with dankstorage as i removed dankstorage and was still getting this with an edited version of all the mods 5

EDIT: https://www.curseforge.com/minecraft/mc-mods/better-bedrock-generator is also causing this (at least from adding 1 mod at a time)

This is apparently a known issue in forge.
Could you pastebin the full latest.log file for the crash?

Thanks for the report on the 2.1.2.7 build.
I will need to investigate further.

@thraaawn To help ya with this I'm going to put my latest.log file here. It's for a custom pack I'm making for 1.15.2, but it crashes with the same reasoning as imilian.
https://pastebin.com/r7UkE2wJ

Gotcha, Thanks @thraaawn. I'll reference that post and see what I need to do as disabling dank storage made MC load up just fine.

Thanks @Shindur, your actual problem is the one right at the top of the log:

[11:46:20] [modloading-worker-14/ERROR]: Failed to create mod instance. ModID: dankstorage, class tfar.dankstorage.DankStorage
java.lang.IllegalStateException: install mixin
at tfar.dankstorage.DankStorage.(DankStorage.java:53) ~[?:2.5]

This should be reported to DankStorage instead. Actually. It has been: here.

sorry been working and didn't get a chance to check for updates (12+ hour shifts) ill check now (updated pack so will check if i'm still getting error although can't see why i wouldn't)

EDIT: 2.1.2.6 latest.log https://pastebin.com/TMMXSE9Q
2.1.2.7 latest.log https://pastebin.com/4DZgTu6y

You are having the same problem as shindur.

[21:11:58] [modloading-worker-0/ERROR]: Failed to create mod instance. ModID: dankstorage, class tfar.dankstorage.DankStorage
java.lang.IllegalStateException: install mixin

so dankstorage failing to create a mod instance is what is causing bonsai trees to crash?

DankStorage depends on mixin.

What is it in my case then? No DankStorage here.
https://pastebin.com/ndUS3Sb2
I would happily try to uninstall it. Never will uninstall BT.

Attach the full latest.log, not the shortened crash log to see the actual error.

Just tried creating a 1.15.2 game using the Forager modpack. Got this crash also.

Full log

Just tried creating a 1.15.2 game using the Forager modpack. Got this crash also.

[14Feb2020 13:34:51.042] [modloading-worker-4/ERROR] [net.minecraftforge.fml.javafmlmod.FMLModContainer/LOADING]: Failed to create mod instance. ModID: refinedstorage, class com.raoulvdberge.refinedstorage.RS
java.lang.ExceptionInInitializerError: null

Report this to Refined Storage.

What is it in my case then? No DankStorage here.
https://pastebin.com/ndUS3Sb2

Edit: OK it was Refined Storage.