I'm having similar issues to @
bsellers100 - I've added the username/password and am in a service area but when I use physical remote control to select the Locast addon, all it does is work (spinner on the screen). I don't get the option of guide, live, channel, etc.
However, if I use a different PC to control that same Kodi box via the webui, then I can select a channel and watch it.
So I know the user/pass are entered correctly, and I know that I am definitely in a service area (ie: NY). So there is just something at the beginning, when I first use a physical remote (Logitech Harmony) to select it, where something goes haywire.
Other clues - while it is spinning trying to load, if I hit Stop, nothing stops. If I hit exit, it exits briefly - but then immediately starts spinning again. If I press Exit quickly, several times - then I can actually exit.
I did once manage to get the a screen that gave me options for live/guide/channels (I think those were the 3 options, there was one more option ".." to go up a directly). However whenever I pressed an up or down arrow, it would only briefly go up or down, before self-returning to the "..").
So I think somehow the physical control is somehow negatively interacting with the addon. I'll work on getting a log.