When entries are listed in the tabs :Disc Online", Tracks Online" e.g. or you see the error message "net::ERR_BLOCKED_BY_CLIENT" in the console of your browser, the cause of the problem is most likely an Ad Blocker extension.
Please disable Ad Blocking for the site www.cndmusictracker.com. The site www.cndmusictracker.com does not display any ads !
If you use Ad Block Plus e.g., click on the red ABP icon and select "Enabled on this site" to change it to "Disabled on this site".
An Ad Blocker extension can interfere with so called Ajax calls that the CND Music Tracker portal makes to its server.