Here's something you can try to fix the issue.
From PowerShell admin, run:
- get-appxpackage Microsoft.MSPaint | select InstallLocation
Copy the install location to the clipboard or save it to a text file. Let's say the path is as follows:
- C:\Program Files\WindowsApps\Microsoft.MSPaint_6.2203.1037.0_x64__8wekyb3d8bbwe
Then, run the following to uninstall Paint3D.
- get-appxpackage Microsoft.MSPaint -allusers | remove-appxpackage
Open Command Prompt (under TrustedInstaller rights using AdvancedRun tool.)
From the TrustedInstaller CMD Prompt, run:
- rd "C:\Program Files\WindowsApps\Microsoft.MSPaint_6.2203.1037.0_x64__8wekyb3d8bbwe" /s /q
Reinstall Paint3D from Microsoft Store.