Camera suddenly unavailable...

I use my camera often, on my LG K7, but out of nowhere, I get an error message, when trying take a pic, regardless if straight through the default camera app, or any other app (FB, Instagram, etc.) I get a pop up message saying "Camera Error camera unavailable". I've tried booting in safe mode, cleared cache and even data, and also cleared cache in my gallery to no avail. I checked for Android updates, and everything seems to be ok on that part. I'm running 5.1.1. It's the a way to manually update the default camera app, I can't seem to find anything to help. I've looked through multiple threads, videos, and nothing works. Taking pictures is a huge hobby of mine, I just want it to work!

Force stop the application, clear it's cache is a good place to start. Then wipe cache partition in the device to freshen it up a bit and hopefully you will be back in business...

I have seen multiple Lg K7 with this issue. I tried force stopping, clearing data, clearing cache, clearing cache and finally a factory reset. None worked. I contacted Lg Support and they said to send the device in for repair.