Just Dance 2019 softlocks on bootup when in Netplay

[fearlessTobi]

Well, the title kinda says it... if I try to run Just Dance 2019 from Netplay, it just stays at a blackscreen and doesn't boot. The Log is being spammed with "42:56:414 core\netplayserver.cpp:674 I[NETPLAY]: Got client message: 60" but nothing else happens. Is this a known issue? Just to be clear, if I don't use Netplay, the game runs 100% perfectly fine.
Here's the full log if you need it: https://pastebin.com/0gvqUvZi.

Thanks for your help.

[JMC47]

Have you tried turning off dualcore?

[fearlessTobi]

This worked, tyvm but now I'm fighting with the Wiimotes.