recovery mode – HELP ME ABOUT BOOTLOADER

I did something very stupid: I installed a custom ROM on my Razer phone 2 and got stuck in a bootloop. However, when I turned it off to save the work for tomorrow, TWRP would not start. I am now using a different computer than the one I worked on at the time, so Fastboot Devices is not recognized. I’m done.
Please help. Thank you very much.

plus
my device Razer phone 2
State
Cannot use Fastboot and ADB commands
Cannot switch to Download Mode