All aspects of the chatbox work fine except for notifications. When i try to edit the Notification settings in the Admin CP, i get a blank vBulletin Message with only the "Go Back" option.
Are you sure you don't have cpnav_vbshout.xml and cpnav_vbshout_pro.xml in your /includes/xml folder? Please double check for the presence of those files as that's the link to the old page - it was changed in 5.4.0
Those files are not included with v5.4.6, the new files are named cpnav_dbtech_vbshout.xml and cpnav_dbtech_vbshout_pro.xml.
Please verify you have both cpnav_vbshout.xml / cpnav_vbshout_pro.xml and cpnav_dbtech_vbshout.xml / cpnav_dbtech_vbshout_pro.xml. If you do, delete the cpnav_vbshout.xml / cpnav_vbshout_pro.xml leaving the other two files intact
Anyway, i fixed the issue by a re-install. Everything seems to be in working order and might i add this is a great product for vBulletin. Great work guys!