Hello,
Up but not sending life signal means that our servers cannot see your router. ‘this does not prohibit operation of the hotspot.
The router sends a signal to our server, but this traffic can be blocked by a firewall in your
network, or the SPI firewall feature on the router. Turning it off can resolve the problem. In DDWRT this is under Security/Firewall and check Disable beside SPI Firewall. Be sure to click “Save Settings” at the bottom of the page for this to stick.
However if you have run out of sessions then your hotspot will not be functional until the new monthly quota starts. By upgrading you get 3,000 sessions per month along with the customization options and the usage logs.