I am mostly getting this error message:
2019-06-13 10:38:55.533 java unrecognized type is 4294967295
2019-06-13 10:38:55.534 java *** Assertion failure in -, /BuildRoot/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1671.50.111/AppKit.subproj/NSEvent.m:1977
!AAARGH!! WHAT DOES THIS MEAN?