I can not install Ngrok as a service on Windows.
.\ngrok.exe service install --config C:\Users\dev\AppData\Local/ngrok/ngrok.yml
INFO[08-02|20:16:08] open config file path=C:\\Users\\dev\\AppData\\Local\\ngrok\\ngrok.yml err=nil
INFO[08-02|20:16:08] detect init system sys=windows-service
CRIT[08-02|20:16:08] install failed err="Failed to install ngrok: Access is denied."
PM from ngrok here. Usually installing ngrok as a service requires administrator privileges. I would suggest trying to run that command in a command prompt opened in administrator mode.