Help! - App Store crashes immediately on opening

Hi,

You've done an excellent job troubleshooting this problem. Here are some more things you can try:

• Restart your Mac by choosing Apple menu > Restart.
• Disconnect any peripheral devices you just connected (for example, a printer). They may not be compatible with your version of macOS.
• Uninstall any app plug-ins or enhancements from other manufacturers.
• If you recently updated the app or macOS, a plug-in or enhancement you installed may no longer be compatible.
• Diagnose problems with your Mac to learn whether hardware you installed, such as additional memory, is incompatible, improperly installed, or defective.
• Worst case scenario - Reinstall macOS. It reinstalls the operating system and leaves everything else alone. I believe it will reinstall the app store and other built-in apps as well.

I've just resorted to reinstalling the OS which has worked.