Tether AX73 FW
Well after numerous weeks of waiting for the new FW to list on the support page it hasn't UK.
Tether refuses the same password used to login to the router from a browser.
Performed.
Factory Reset.
Uninstall/re-install Tether.
Reboot phone & router multiple times.
Suspect ios26 has broken things.
You really should make us aware that the latest FW cannot be rolled back & when I came here to moan I also faced do I want to go to the UK site & your session has timed out and rejecting the login here which suggests you've shot me a FW for the USA through the Tether FW update function.
Please update the support page for the router asap & consider Apple may have broken your app recently.