Hi there,   I use the current RadStudio 11.3 Alexandria and have such issue that the project tree disappears suddenly, not sure how to reproduce that at the moment. It looks like this,                and seems to be re-generated only when project close/open                                   Currently I'm working under Macos platform, but I don't assume that this is the root cause. By the way, also all other tabs under this panel appears completely empty.   Is this a known issue or did somebody has any idea how to fix that ?