Enjoy your freedom and never be a slave of Facebook again😉 JK
Are you using the Facebook App or the mobile browser? iOS, Android Windowsphone?
Here some tipps:
- Turn off and on your device (helps in 99%).
- Make sure that in your phone settings the "use of mobile data" is activated for the Facebook App (settings depend on your device's OperatingSystem)
- Try to un- and re-install the App