App crashes(closes) immediately when any app window is added to it.(Multrin not at all working in MacOS Big sur latest version)

[CM2222]

Bug description
App crashes immediately every time whenever any app window is added to it.

Screenshots
https://paste.pics/50ff61c2e6bd3142cf78ddfbed48cfbd

Details:

• Operating System: Mac OS Big Sur Beta 9
• Multrin version: Multrin-Setup-1.3.0

Additional context
Report -->
https://paste.pics/9c5fc389fb4a77488f35dffb1b02307a
https://paste.pics/fea9e834d8c50613a08960496872e847

[PapiPeppers]

Same issue on big sur

[samwzlim]

Same here, encountering this issue even on the stable version of Big Sur. Devs please have a look at this issue.

[vjpr]

See #105. macOS no longer supported.