Many users are complaining where the TaiG jailbreak of iOS 8.3 can get stuck at 20%.
If you’ve waited for a while and/or you receive an error -1101, you can resolve this issue with installed iTunes 12.0.1.
Follow these steps:
Step 1. Remove the current version of iTunes on your PC
Step 2. Reboot your PC
Step 3. Download and install iTunes 12.0.1, do not update it when prompted!
Step 4. Try again with TaiG jailbreak