No creation of db-tables on fresh install

I want to install a new nextcloud.
Server: Windows Server 2016 with IIS and PHP 7.2
Database: MySQL 8.0.14
If I fill out the initial data for user and database, the installion only create a oc_migrations - table in the database and stop with the error:
An exception occurred while executing ‘SELECT uid, displayname FROM oc_users WHERE uid_lower = ?’ with params [“ncadmin”]: SQLSTATE[42S02]: Base table or view not found: 1146 Table ‘nextcloud.oc_users’ doesn’t exist
I tried to use PostgreSQL and MySQL - but the same error in both cases.
For each attempt I deleted the config.php before.
The connection to the database itself seems to work, because a table oc_migrations are be created.
I also test it to let create the whole database by the install-routine. Same problem.
Any Ideas?

Did you solve this problem? I have the same problem still can’t solve it