Hi, I'm trying to register my Moodle site so I can receive the security alert emails. I log into my Moodle site, go to Site Administration > Registration, and fill out the form. When I hit submit, I get the following error from http://hub.moodle.org/local/hub/siteregistration.php - But I'm not entering a username in the form, so I don't know how to fix: The username can only contain alphanumeric lowercase characters, underscore (_), hyphen , period (.) or at symbol (@) Stack trace: line 47 of /user/lib.php: moodle_exception thrown line 1365 of /local/hub/lib.php: call to user_create_user() line 1182 of /local/hub/lib.php: call to local_hub->create_hub_token() line 341 of /local/hub/siteregistration.php: call to local_hub->register_site() line 303 of /local/hub/siteregistration.php: call to process_registration()

When username is not standard, the registration fail. We should not validate username on the hub, it doesn't really matter how is the username on the remote site.