Server error when adding products - troubleshooting not working

I keep getting ‘server error’ when updating a product page. None of these have worked:

  • Clearing cache and cookies

  • Trying a different browser (firefox/chrome)

  • Trying a different internet network

  • Trying a different device

  • Shopify status is all ok

  • Waiting - it’s been 5 hours and still not working

The only advice I can find says to do the above so I have no other ideas on what to do