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Invoke Create Project dialog and click in the Categories pane. Press <shift>S to invoke the keyboard accessible search box. What appears is a blank box with no focus. Pressing down arrow causes the box to be refreshed showing Search: __ Now the box appears to be working properly, although the input field is only one character wide - too small to accept multi-character strings.
Just switch the search off.
It's TreeView responsibility, reassigned to Petr as owner.
*** Issue 49003 has been marked as a duplicate of this issue. ***
This works correctly now, it was fixed some time ago as general QuickView problem. Even the width is OK these days.