I'm using the modpack REBIRTH OF THE NIGHT 3.1.1 (last update)
I enter normally in others worlds, but my main world always make my game crash, showing this message in the crash report (full crash report in the link on the bottom)
"# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffbd8bfaf9a, pid=12856, tid=12960
#
# JRE version: Java(TM) SE Runtime Environment (8.0_51-b16) (build 1.8.0_51-b16)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.51-b03 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C [atio6axx.dll+0x6aaf9a]
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#"
https://pastes.dev/H9rD5lqfD6 (full crash report)