I've started using Printoid and thought I might try the Printoid Notifications plugin as well. The setup seemed simple enough and it is very customizable.
However, although I have gotten Printoid itself to work great, even away from the printer's LAN, the Notifications plugin simply doesn't work. Oh, I get the "Sent successfully, check your phone!" success message in OctoPrint, but the notification never arrives on my phone.
To be clear, I am not using OctoEverywhere for remote access; I have a NAS set up with a reverse proxy and Let's Encrypt with a CNAME set up on CloudFlare so that I can reach my OctoPi from anywhere simply by going to https://octopi.domain.tld/. Again, this setup works perfectly, but I don't know if it might have something to do with this problem.