Hmmmm, what ios are you on? if its 10.2 then you may need to resign the yalu app as it only lasts 7 days
----If you never find a fix for this then install Clutch2 from cydia open up terminal and:
1- Login ( su & pass)
2- Once logged in type ulimit -n 1024 and press return
3- Next Type chmod x+ Clutch2 (Must be capital C)
4- Type ./Clutch2 (This will show all your options)
./Clutch2 -i will show all the apps crackable along with a specified number, if you wanted to crack Netflix and you typed ./Clutch2 -i you would see a number next to netflix, thats the number you need.
Type ./Clutch2 -b (your number) for just the Netflix Binary
Type ./Clutch2 -d (your number) for the whole ipa to be cracked