[Appointments+] Appointments+ Schedule exceptions not updating

On https://julieglassco.com, I'm setting up appointments plus. I first was able to save non-working exceptions. I now want to add more days not available this first month but I'm running into a saving problem. The days are highlighted, I click to save, the message regarding successful update appears but the changes are not showing – when I go back to the settings page, the exceptions are still showing highlighted with the active save button. I click it again and I get the same process with the successful update message but no actual save.