The task Execute operation 'provisionWebsite' with ID 4af93105-b348-41cc-8913-91c697122bb4 on resource 0894e2ed-81ae-4651-8daf-2dbe2ec7aec5 fails with the error:
Error occurred during request to WHP API on service node 192.168.68.221: "Access denied for user 'root'@'192.168.68.221' (using password: YES)".
With enabled debug in the dispatcher log we can see:
[2018-10-31 09:44:54] DEBUG [extension/shm] Call Plesk-RPC with request: <?xml version="1.0"?> <db_server><add><host>192.168.67.214</host><port>3306</port><type>mysql</type><admin>root</admin><password>*****</password></add></db_server>
The server 192.168.67.214 was added as a shared DB server and the root password was changed after that.
Update the root password at Services > WebHosting Plesk > Shared Database Servers