Roon does not connect after update

For something like 2 years I am using Roon without problems but after de latest update I get the message (see picture) and nothing works; closing down all the equipment etc does not solve the problem. What now?

Roon Core Machine

Networking Gear & Setup Details

Connected Audio Devices

Number of Tracks in Library

Description of Issue

Hey @Mathijs_Mennen,

Thanks for your patience while we work through each thread. I wanted to check in and see if you were still running into connectivity issues?

If so, we’ll need more information about your core and system. If you could finish filling out the necessary information in your original post, that would be helpful!

Are you able to access the webUI of your ROCK? Here is more information on how to do this: