SQL failover server cluster

Hi guys,
I recently deployed SQL Server with Cluster Shared Volumes using this tutorial:
SQL hacks com deploy SQL server with cluster shared volumes part 2
(I cant use link)

The installation went well, but now it is not possible to create databases on the cluster. I created the logins first and wanted to connect them to the database, but when I try to create the database, I get this error.

I tried via GUI and tsql

Does anyone know what could help me to solve my problem?