i bought the same router model and having same issue can't get into internet.
checking the connection status, it shows connected and obtained IP address but it start from the range 172.x.x.x instead(always this range no matter how many time reconnect).
checking traceroute it stop after enter tm network. it sure look like connected but can't get internet.
then i switch it back to my previous router L7 and it's working and able get internet, checking the ip it's not 172.x.x.x instead 203.x.x.x

still checking how to resolve this issue

Mine was the password incorrect also and the TM installer never provided any password of the router, the so call password wrote on sign-off paper is not the password.

Yes the 5Ghz power ranger is much lower than the 2.4Ghz, lucky i use on small area.