Its probably a incompatibility with a mod i have installed, will do some testing and report back, here is the crash log till then.

https://pastebin.com/qnC2B2PW

The last log seems to be related too worley cave gen.

Though now i am getting this, it says either 2 or 12 already exists.

https://pastebin.com/uMEZ9DWk

Second Error log is caused by streams. Gonna reconfirm that the first was caused by worley caves

EDIT both were caused by streams.

https://gist.github.com/border999/2ad4fa1bed014c15a454229a38e7e98e