You are attempting to bind(2) to a local address that isn't local. For example if the IP addresses of a machine are 127.0.0.1 and 1.2.3.4, and you're trying to bind to 1.2.3.5 you are going to get this error. Check to make sure the address you are trying to bind to exists on the machine you are trying to bind it from.
4 pages link to EADDRNOTAVAIL:
lib/main.php:944: Notice: PageInfo: Cannot find action page
lib/main.php:839: Notice: PageInfo: Unknown action
lib/plugin/WlugLicense.php:99: Warning: Invalid argument supplied for foreach()