Problem with Cydia.
I had few problems with the facebook app when I found my jailbroken Iphone 5S was the problem. In fact, I think it was the jailbreak. I was unable to install most of tweaks I wanted because dependence errors... So, I decided to search on the internet. I've tried plenty of solutions : reinstall cydia substrate, safe mode, etc.
Finally, I gave up on it and removed Cydia installer. Everything from Cydia is gone, I've done a reset to factory and then everything works ok (facebook and other apps).
Now, I can't reset my phone anymore because it's caught in loading loop and doesn't reset at all... I can access my phone after a hard reset. My last idea was to try jailbreaking my 5S again even if there is a warning on the evasi0n software about jailbreaking an already jailbroken iDevice.
I tried to run evasi0n as an administrator, wait for detection, click jailbreak and then unlock when prompted but at the end, no Cydia. Again, I've found something on internet to try. Now, if I try to jailbreak, when evasi0n wait for me to unlock the phone, it's not booting completely. When I'm wainting for the lockscreen to come, the message on evasion goes from to continue, slide to unlock to booting device. Evasi0n reboots my phone and says done, but anything new out there, Cydia is not installed.
This is why I ask because I don't have any other ideas to fix this..