fatal error after update activating on premium yoast seo

Confirmed. Same issue here.

I resolved the issue by manually reinstalling the plug via FTP. Set to overwrite files and now working perfectly. Premium users can get manual installation and license key info at:
https://kb.yoast.com/article/34-how-can-i-update-my-premium-plugin#manual

Hope this helps.

for me it went away after I cleared cache. my point was to notify of error so I guess I will mark as resolved.

Me, too!!!!