Thanks, that has worked!Ok, so you're going to have to update your twrp. If you want, keep a copy of your 3.2.1-1 img file on your device, as it does allow a wider range of recovery options.
A link to the updated twrp is here
https://android.jenslody.de/BootleggersROM/j5lte/TWRP/
Download most recent, flash img via odin, flashify, or easiest, through twrp itself (install>flash image>navigate to recovery img)