Update your bootloader and modem. Also make sure you have made a fresh install of the rom. Bootloader and Modem can be found in the OP. Another problem can be that you are didn't decrypt your phone. To fix this read below how to disable encryption.
This is because of googles changes concerning SD card. To fix this open Titanium Backup, Menu, Preferences, Backup Folder Location, Storage provider and than hit DocumentProvider Storage and select your SD card. Problem solved
Two things: first, install your providers CSC using CSC installer and flash in TWRP or flashing stock CSC with Odin. Second Thing: You can install the modem from your provider, also find your modem on Sammobile and install it with Odin in CP tab.
Your device is still encrypted, on step 0 of my rom instructions it tells you to be sure you're not. So, what do you need to to in case you are still encrypted. HOW TO DISABLE ENCRYPTION: 1. Boot into TWRP 2. Select Wipe 3. Select format data 4. Then you manually need to type "yes" with the keyboard 5. Confirm the wipe (this will remove the encryption) 6. Reboot your recovery