VS 2019 doesn't connect to SQL Server

I am developing an ASP.NET API using VS 2019 Enterprise. It suddenly doesn't let me connect to my SQL server. I tried both a local SQL Server with Windows authentication and a remote SQL Server with password authentication. I never had this problem until today. What could be the problem?

I am also able to connect to both of these SQL Servers through MS SQL Server Management Studio using the same authentication methods.

Error for local SQL Server and Windows authentication:

Microsoft.Data.SqlClient.SqlException
  HResult=0x80131904
  Message=Cannot open database "myDb" requested by the login. The login failed.
Login failed for user 'DESKTOP-PSCSGS6\MyLocalUsername'.
  Source=Core Microsoft SqlClient Data Provider
  StackTrace:
   at Microsoft.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)

Error for remote SQL server with password authentication: (credentials are correct)

Microsoft.Data.SqlClient.SqlException
  HResult=0x80131904
  Message=Cannot open database "MyDb" requested by the login. The login failed.
Login failed for user 'MyDbUserName'.
  Source=Core Microsoft SqlClient Data Provider
  StackTrace:
   at Microsoft.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)