Cubase crash while working on score

Hello, this is a crash occurred while working on positioning chords in score editor.
Cubase 10.5_2020-11-16-145743_iMac-di-Giutom.crash (112 KB)


I reported this to Steinberg CAN-32540. The crash is very generic though.

And I should mention, you are not using supported macOS. only macOS 10.14 and 10.15 are supported with Cubase 10.5.