If you have a database source connected to your AppSheet account from any of our available database sources and you made changes to the data source itself like changing the password or user; you'll need to refresh the connection from your AppSheet account as well in order for the apps to continue working.
Steps to refresh a database connection:
1. Go to my account and navigate to Sources
2. Identify the data source you need to update, then click on the data source icon. Please note, if it's a shared data source, the AppSheet account that originally set up the connection must be the one to update it.
3. Click on the data source
4. Update the fields that need to be updated and then test the connection.