Broken style resources

[JamieF 0]

Hi all, I'm developing an app for MacOS using Delphi 10.4.  Things have been going fine until today when I tried to edit the default style for a TTreeView.  When I select that option (and this is also true when I try editing the custom style) I get an error: "Cannot find style resource for ." - this leads to exceptions in the Delphi IDE and I need to restart. When I try to edit a label's custom style I can do so no problem. This is also true with my stylebook style that I am using on a frame that I embed on the main form.

 

Any ideas? Thanks!

Edited November 25, 2021 by JamieF