Error after fixing mysql_4byte_support NC19.0.1

working through this:

https://docs.nextcloud.com/server/15/admin_manual/configuration_database/mysql_4byte_support.html

getting this …

grafik

any ideas how to fix this …
i’d love to thest the backup as mentioned, but first i guess i should solve the errors ;(

Have a look here, they seem to have solved the same issue: