I encountered this bug as well but I was unlucky enough to not have a save outside of the cave before entering (besides an old one that would lose several hours of progress). I tried a bunch of different recommended fixes but none of them worked. I'll leave the crash log below:
Game Version: 1.2.0.16
Error: System.Exception: Failed to locate entrance waypoint 'randomEvent_lux-hole_exit'
at dud.LogAndThrow[T](Exception innerException, LogSeverity severity, String message, Object[] messageArgs)
at d5n.aq3()
at eyo.b4(e48 A_0)
at bs6.d(e48 A_0)
at b8a.a(e48 A_0)
at b8a.b(e48 A_0)
at b8a.adr(e48 A_0)
at bs6.f(e48 A_0)