It seems my host is simply incompatible with ClickOnce. This is probably for the best, as Microsoft is no longer supporting it. I’ll need to explore alternate avenues for auto-updates, but for the time being, I’ve saved everyone the annoyance by removing the functionality. NGL, I am disappointed, but not defeated. If there’s a way to do it, I’ll find it eventually. In the meantime, there are no other changes to the features outside of that, so if you manually update your copy, it will get rid of the auto-updates and thus the errors.
Thank you for choosing MediaAlarm.