I am having the same problem, not with 1 but 2 systems now. Everything is enabled and disabled as it should be, I've done everything I normally do using the venus or cerbo. The data is updating to VRM but there is no realtime link, on both systems. I can download and upload veconfig, but can't open the remote. I don't know if this is related but I could not connect to the gx with the MK3, I tried until I was spitting insults and then used the online method.
Have you read through this troubleshooting document and followed all the tests and recommendations?
Edit; updated link -
As JohnC said, we do need more info. To get it working out of the box you need to enable remote console on VRM, click on disable password and reboot the color control.
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