We created out new SharePoint 2019 Farm of 3 SharePoint Servers and 2 SQL Servers (Cluster). When I try to create a new web application I get an error:
Cannot update database on SQL Server instance ''. Database is read/only. Additional error information from SQL Server is included below. Failed to update database "SharePoint_AdminContent_" because the database is read-only.
We checked but the data is not read-only and the status is (Synchronizing) as it should be. We have no idea what the problem is but we also get a warning on the Central Administration page saying: We apologize for the inconvenience, but we've made OneDrive and sites read-only while we do some maintenance.
This is an on-premise farm and we have no connection to One Drive. I thought it's because the farm is in "maintenance mode" but we checked through PowerShell and it wasn't. Can anybody help please? Any help is highly appreciated.