Mysql don't start in Nextcloud jail afetr upgrade to release 12.1

I update/upgrade freenas 11.3 U5 to Truenas 12.0
I successfully upgrade the jail with Nextcloud to release 12.1-RELEASE

once in the jail console
nginx is running
mysql-server is on the list of services
but is not running
if I try to start it: service mysql-server start -v
I don’t get any error but the mysql server don’t start

any suggestion is welcome