Hello, please try repairing your SSMS installation by opening the Visual Studio Installer > More > Repair.
If it doesn't work, please try the following steps:
- Close the Visual Studio Installer.
- Delete the Visual Studio Installer folder. Typically, the folder path is
C:\Program Files (x86)\Microsoft Visual Studio\Installer. - Run the SSMS bootstrapper. You might find the bootstrapper in your Downloads folder with a file name
vs_SSMS.exe. Or, you can download the bootstrapper from the installation page for SSMS. Then, run the executable to reset your installation metadata. - Try to install or update SSMS again.
Besides, did you have a Windows Update recently? Does it work before Windows Update? You can create a new project and run it to check again.