I get Unfourtunatley, (app) has stopped. message, how can I fix it?

A

AC Question

I get "Unfourtunatley, (app) has stopped." message

I have an LG L9 with CyanogenMod installed. It was working just fine for months but about two days ago almost all my apps started giving "Unfourtunately, (app) has stopped." message. Tumblr, gooogle apps, instagram, you name it. The second i open the app, it gives that message and closes. I tried uninstall-reinstall all the uptades on the apps and the apps' itselves, I tried cleaning the cache and data, I even factory reset the whole phone twice. I'm not sure if it's something to do with CM or my phone itself (I know it's pretty old, so i would expect that.)
If anyone knows anything it would be really helpful.