Upgrade from 8.1.5 to 9.0 LTS: "Migration version of this database is too new" (4372452)

Upgrade from 8.1.5 to 9.0 LTS: "Migration version of this database is too new"

After upgrading Identity Manager from version 8.1.5 to 9.0 LTS, attempting to connect to the Database directly gives an error: 

"Migration version of this database is too new.  This software works only with migration version up to 2019.0001.0021.9999"

WORKAROUND 1 

- Check if the server has internet access (it is trying to download WebView2)

- If internet access is not possible, download WebView2 from here:

Download the WebView2 Runtime

- Install it manually -> WITH admin privileges (otherwise it won't get installed to all system users)

- Set the windows system environment variable IM_NO_WEBVIEW2 to true.


WORKAROUND 2 

- Uninstall and reinstall the Application Server with admin privileges.

- Reboot the server after reinstallation.

STATUS

This is a known defect ID #36107. A fix will be released in a following Cumulative Update (CU).