Hello @quinting and welcome to the forum!
Do you recall having every typed a password for OneDrive? Do you see anything like that now?
OneDrive is confusing because it has so many variations. Is yours Personal or “for Business”?
Make sure you configured Duplicati with the right storage type for your specific storage provider.
For OneDrive Personal, you probably want Microsoft OneDrive v2 which lacks --auth-password.
Sometimes changing types can leave leftovers from other types. You can try Advanced options on screen 5 for Options to see if you see that one. Another way to see options is to look at Commandline for that job.