Hey ronald87x the same problem happened to me on my old S4 after installing twrp, go on a PC and download something called "Odin", then search for " Stock "Carrier" Galaxy Note 4 Rom", download it, then put your phone into Download Mode and plug the charger to your phone from your pc. Open Odin and make sure Odin see's your device. Upload your Stock Rom to Odin which should say either "PDA" or "AP" and make sure an option called F. Reset, and Reboot are checked, now click start and wait about 10 minutes to complete. Take out and put back in the battery & go into Recovery Mode then Factory reset it & your done. If it doesn't boot then you may need something called a ".pit" file
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