Error when starting a game with steam

I am getting this error when i am starting a game with steam.

Native stacktrace:

	/home/bavramor/.local/share/Steam/steamapps/common/Last Epoch/Last Epoch_Data/MonoBleedingEdge/x86_64/libmonobdwgc-2.0.so(+0xd5268) [0x7fe4a0e0f268]
	/home/bavramor/.local/share/Steam/steamapps/common/Last Epoch/Last Epoch_Data/MonoBleedingEdge/x86_64/libmonobdwgc-2.0.so(+0x5bcf5) [0x7fe4a0d95cf5]
	/usr/lib/libpthread.so.0(+0x12860) [0x7fe4a9451860]
	/home/bavramor/.local/share/Steam/steamapps/common/Last Epoch/Last Epoch_Data/Plugins/x86_64/libOni.so(_ZN5Eigen8internal26call_dense_assignment_loopINS_6MatrixIfLi4ELi1ELi0ELi4ELi1EEENS_14CwiseNullaryOpINS0_18scalar_constant_opIfEES3_EENS0_9assign_opIffEEEEvRT_RKT0_RKT1_+0) [0x7fe49839f53a]
	/home/bavramor/.local/share/Steam/steamapps/common/Last Epoch/Last Epoch_Data/Plugins/x86_64/libOni.so(_ZN5Eigen15PlainObjectBaseINS_6MatrixIfLi4ELi1ELi0ELi4ELi1EEEEC2INS_14CwiseNullaryOpINS_8internal18scalar_constant_opIfEES2_EEEERKNS_9DenseBaseIT_EE+0x34) [0x7fe49839f57a]
	/home/bavramor/.local/share/Steam/steamapps/common/Last Epoch/Last Epoch_Data/Plugins/x86_64/libOni.so(+0x6d4fb) [0x7fe49839d4fb]
	/lib64/ld-linux-x86-64.so.2(+0xf16a) [0x7fe4a99f716a]
	/lib64/ld-linux-x86-64.so.2(+0xf27b) [0x7fe4a99f727b]
	/lib64/ld-linux-x86-64.so.2(+0x13234) [0x7fe4a99fb234]
	/usr/lib/libc.so.6(_dl_catch_exception+0x5c) [0x7fe4a93b49cc]
	/lib64/ld-linux-x86-64.so.2(+0x12bb7) [0x7fe4a99fabb7]
	/usr/lib/libdl.so.2(+0x1286) [0x7fe4a97a6286]
	/usr/lib/libc.so.6(_dl_catch_exception+0x5c) [0x7fe4a93b49cc]
	/usr/lib/libc.so.6(_dl_catch_error+0x1f) [0x7fe4a93b4a4f]
	/usr/lib/libdl.so.2(+0x18d9) [0x7fe4a97a68d9]
	/usr/lib/libdl.so.2(dlopen+0x36) [0x7fe4a97a6316]
	/home/bavramor/.local/share/Steam/steamapps/common/Last Epoch/Last Epoch.x86_64() [0xda3e01]
	/home/bavramor/.local/share/Steam/steamapps/common/Last Epoch/Last Epoch.x86_64() [0x44d552]
	/usr/lib/libc.so.6(__libc_start_main+0xee) [0x7fe4a92abb8e]
	/home/bavramor/.local/share/Steam/steamapps/common/Last Epoch/Last Epoch.x86_64() [0x45a591]

Debug info from gdb:

mono_gdb_render_native_backtraces not supported on this platform, unable to find gdb or lldb
pid 10599 != 10594, skipping destruction (fork without exec?)

=================================================================
Got a SIGILL while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

Game removed: AppID 899770 "", ProcID 10593 
Exiting app 899770
No cached sticky mapping in ActivateActionSet.JS method call Messaging.PostMessage with 4 arguments
JS method call SharedConnection.SendMsgAndAwaitResponse with 3 arguments
JS method call Messaging.PostMessage with 4 arguments
JS method call Messaging.PostMessage with 4 arguments

At first I thought that the game needs “mono” or “monodevelop”. I also tried to install it. Tried, because the package “monodevelop” is broken.

https://nixos.org/nixos/packages.html?channel=nixos-19.03&query=monodevelop

Can anyone help me?

Thnx Bavra