I advise you to use GCAM, as it'll greatly improve your overall experience with the camera.
There's a terminal available in TWRP, you should try to use that.
May I ask why you decided to change the accent colour via command? I believe you can now select any colour you want with the built in menu.
he mentioned that he's using oreo oos...
Try this one https://forum.xda-developers.com/oneplus-5/development/recovery-twrp-3-2-1-0-oreo-oxygenos-5-0-t3725723
Also try downloading OTA once again maybe it had some download issues.
You can flash TWRP within TWRP recovery mode as well. Tr...
I'm using S6e G925T Nougat.
I've flashing latest twrp-184.108.40.206-zeroltmo.img.tar via odin 3.12.7 and got succeeded.
But when i try to boot into twrp by pressing vol up+home+power it turning to stock recovery.
I've trying with different version ...
Can you answer? :D