Issue:
- The Project Browser disappears and cannot be brought back.
- The Project Browser freezes and cannot be interacted with.
Causes:
There could be several factors that trigger these issues:
- The Project Browser is located outside the displayed area.
- The User Interface system file is corrupted.
Solution:
Project Browser Disappears and Cannot Be Brought Back:
1. Turn off all monitors except for one if you are using multiple monitors.
2. Change the display resolution to a lower resolution.
3. Change back to the recommended resolution.
Project Browser Freezes and Cannot Be Interacted With:
1. Open Windows File Explorer.
2. Navigate to %APPDATA%\Autodesk\Revit\Autodesk Revit 2020\<language>
3. Delete UIState.dat
4. Open Revit
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