Some of you have reported that the Hive365 plugin does not work. Hive themselves are aware of this and have posted a temporary solution until they've fixed their plugin. Link to announcement Please use this until Hive releases a fix.
If you do not do this, is there anything that will happen? Like you getting kicked or just the plugin freaking out? Cheers for the heads-up though.
http://steamcommunity.com/gid/103582791434245071#announcements/detail/111813217717621371 Appears to be fixed.