Answer
This specific ifsdoc-related credentials error is commonly caused by a mismatched IFSADMIN password — check whether the IFSADMIN user is unlocked at the database level, and if so, update the IFSADMIN password in the installer/reconfigure tool to match whatever the actual database password currently is, then run the reconfiguration again. This is a more targeted first check than troubleshooting the broader cluster-startup error that often appears alongside it in the same failure.