I have the same issue on 2 sites.
co-op.place staging site – I updated only yoast to 9.03 and get a 500 server error accessing any pages
orleans-office-space.ca – I updated yoast to 9.03, gutenberg and contact form 7 with the same – a 500 server error accessing any pages.
I put orleans-office-space.ca into debug mode and confirmed my suspicions that the yoast update was the culprit.
Through SFTP, I renamed the yoast plugin folder and the errors were gone.
I renamed the yoast plugin folder back and it was deactivated and showed it needed an update to 9.03. It seems there was a problem during the update. When I performed the update again, an 500 error occurred and it would not activate the plugin.
We are hosted on GoDaddy
I have no access to the server logs. I would have to contact GoDaddy for that.