I'm spending my evening re-reading the install pdf on OMV5 before doing anything else. But keep it coming....
1) Have you deleted the original config file yet? I don't see anywhere that you actually did that. If you don't do that then you will keep getting the same error.
2) Try doing it the simple way first. Put everything on one disk. You are using three different disks right now.
3) Use your user PUID and GUID, it should be 1000 and 100