Thank you for your post.
Once you enter the Backup Folder, did you validate the Backup Folder path?
Yes, I definitely validated the backup path. I also tried resetting the path back to the "default" – neither option will allow me to move forward. As I stated in my original post, there is literally nothing that I can do to convince FMS to let me beyond that step of the "schedules" wizard.
I wonder if there's a way to set up a schedule outside of the wizard? Can I possibly script schedule setup from the command line? That would be very nice. But the fmsadmin app for the CLI seems to have no such flags.
If the backup path has been validated by FileMaker Server, and you still cannot proceed, then something else is causing FileMaker Server to not proceed. Since I am unable to replicate the issue, I would close FileMaker Server, move the database files out of the Databases folder and onto the Desktop, remove FileMaker Server entirely from your hard drive, reinstall FileMaker Server, and place the database files back in the Databases folder. Launch a browser on the server, access Admin Console, and make sure everything is running again. Then, set up a new Backup schedule.
Keep me updated with any progress.
I updated to Server version 14.2 (which I had to do to fix a licensing issue), and it appears to have solved the scheduling issue, so that's good!
It happened none too soon, our backups had filled up the OS hard drive on our FMServer :(