Once you install the code, and install the app, that is it. You shouldn't have any additional steps to make it work. There isn't any hidden security settings or anything.
So did you ever have hub security turned on? Did you try to turn it on, then deactivate security to see if something was "stuck" in memory someplace?
What do logs show if you open them in a new window, and try to go to HPM app like you did in your video?
But really, this is probably a question that should have been posted in the HPM thread [BETA] Hubitat Package Manager where the developer could see this. By the title of this particular thread, I doubt he would know to look here. I was expecting something totally different when I read the title, and not HPM erroring out.
I will tag @dman2306 for you though, and see if he sees this.
