It’s helpful to say what you have already tried as it helps cut out first steps replies and gives a fuller picture of the problem.
Have tried it in this sequence?
The problem is that Roon doesn’t work well with wifi. Yet I’m connected via fiber optics. But Roon regularly interrupts, telling me that the speed isn’t fast enough!
I’ve already asked the question and been advised to use ethernet. That’s why I bought some powerline adaptors…