Why is my Viper car alarm system saying I have a door open?

I have had this system for almost a year on my Ford F-150 Lariat. It has 4 doors and I've never had this issue until today. I went a closed all my doors to make sure none were ajar. But every time I lock then arm my truck there's no issues. Once I unarm my alarm and then unlock it then it says door is open. I don't know if this matters but I unarmed it from my phone app and that's when I noticed the issue. Anyone have any suggestions? Never had any issues before and nothing has changed with my truck since having it.

Just to let everyone know. It was a satellite issue and now works just fine. Thanks to the ones actually trying to offer help.

Because your not smart enough to own a car that you check your doors manually, you have more problems with more things on your car. If you want all the gadgets then you have to learn to take it in for those repairs. Good luck Guessing electrical problems over the internet probably won't fix it.

Door switch is broken