It was disappointing to upgrade and find OneDrive support missing.
To summarize the recommended workaround for others, here are the steps
1. Make a dataset for rclone, e.g., /mnt/main/appdata/rclone. Have it owned by admin.
2. Download the linux version of rclone from the rclone site using wget. This is a zip file.
3. Unzip it, move the rclone executable to the "rclone" directory and discard the reset.
4. cd /mnt/main/appdata/rclone
5. touch rclone.conf to make the file (this may not be needed)
6. rclone config --config rclone.config
7. Add rclone as a cron job in System Settings>Advanced. Do not check the two boxes for console and std error output. I use this:
/mnt/main/appdata/rclone/rclone sync --config /mnt/main/appdata/rclone/rclone.conf -v OneDrive: /mnt/main/backups/OneDrive >/mnt/main/appdata/rclone/rclone.log 2>&1
This way you are independent of OS updates which will not clobber you since you are using a private version of rclone and your own config file.
Run everything as admin for permissions. Use the --dry-run flag to test things.