Issues when installing chroot

Hello

I have been trying for the past week to get Kali NetHunter on my OnePlus 3T (using this guide) and it has worked... Somewhat. The issue is when I try to install chroot. The NetHunter app doesn't want to connect to the server. Gives an error that I don't understandt. So I googled it and found out that I can download chroot and install it locally instead. I downloaded it and tried to install. When the install is done it does not give me any errors and just prompts me to install it again. I have tried this 5 times now. Still doesn't work.
ROMs I tried installing chroot on: OxygenOS 5.0.8, LineageOS 14.1 and TugaPower 25.0. All with root access. None worked.
Am I doing something wrong or is it something with my device?:confused: