OS Version:            Mac OS X 10.13.6 (17G6030)
Crashed Thread:        0  AppKit Thread  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Application Specific Information:
*** Terminating app due to uncaught exception 'JavaNativeException', reason: 'java.lang.AssertionError: Threading violation: not AppKit thread'