Hi. I am new to Apple and this is my first time using Cydia so if I don't say the right terms or did anything wrong, please forgive and let me know. Just purchased an Air 2 Wifi-only model on black Friday and had it jailbroken through Pangu. IOS 8.1 I think. I went to Youtube for instructions and used Cydia to download sources, like A Piracy Tweak, A Piracy Repo, A Piracy Repo. I was able to go into these sources and download some apps like Facebook messenger, Instagram, AngryBirds. I saw that the apps are downloaded and are displaced on the screen, but they are almost darken out. When I tap on them, the name of the apps will change to "Installing" and there's a "timing" circle on them. Then after a while, I get the message "Unable to Download App: Instagram could not be installed at this time". This same sequence happen again if I retap the apps. Appreciate any help. There must be something I did wrong. Thanks.