Link no longer working - CDJ-3000 + XDJ-1000Mk2

I have 1x CDJ-3000 and 2x XDJ-1000Mk2 and a DJM-v10. My link feature stopped working today.

The CDJ3000 says:

"Some PRO DJ LINK Features may not work properly due to an old model player included in the PRO DJ LINK. Connect a CDJ 3000 or a later model to use all the features."

If I plug in the USB on one of the XDJ1000Mk2's this message appears:

"Detected existing prodj link on this network, please use an alternative"

I use a switch when all three are connected, however when I just connect the link cable between the CDJ 3000 and one of the XDJ1000's the same messages appear.

I am lost because yesterday everything was working normally.

I updated firmware on all devices today but it did not solve the issue.

Does anyone have any idea what I can do?