System Information
Operating system: Linux 5.8.5-arch1-1
Graphics card: Nvidia gtx-680
Blender Version
Broken: 2.90 release
Short description of error
[I can't find build-in add-on in user preference such as bool tool, loop tool, F2. All gone except Render: Cycle Render Engine add-on, decalmachine, archipack pro, hard-ops ]
Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).