Cannot Access Non-System Databases in SQL Server Express 2016 after I allowed someone access to my SQL Server Express 2016 through team viewer,
I suddenly cannot access non-system databases. No problem with system ones, but I cannot access my other databases. Any ideas?Please see below screenshot



@RDFozz: (Sorry, replies below are disabled) Yes, I knew the user and I am connected as the same user.
From the looks of your screenshot, it looks like your query is not connected to the BERNARDO\SQLEXPRESS01 instance and is connected to the BERNARDO\SQLEXPRESS instance (as indicated at the bottom of the query tab).  Change the connection of that query pane to connect to BERNARDO\SQLEXPRESS01 and I suspect your issue will be resolved.