Gw8 (sp1 I think,) with nothing whatsoever having changed, suddenly Webaccess is no longer loaded on my nw6,5 server.

Startweb calls the GWINTER module, but nothing else happens, and Webaccess does not load. No errors, just no webaccess.

A server reboot makes no difference. What I have seen on the KB does not seem to relate.
Clues /advice appreciated.