I changed the password of the demodb database using the alter user command:
alter USER dba PASSWORD '';
after I initially logged in using the password (it was set to test before the change).
Then when I tried clicking on the tables or views or other, the error in the attached screenshot occurred.
There are 2 ways to handle this situation:
1. Ask the user to reconnect to the database after changing the password;
2. Display in the error message that the password of the database was changed and therefore connection is unsuccessful (and then ask the user to reconnect).
If you logout and login again, everything is fine. This issue is just confusing for the user.
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