microsoft remote desktop for mac mojave 10.14.6 error issue 0x104

Hi there,

I've been using MRD on my Macbook Pro (macOS Mojave 10.14.6) since yesterday.

Now i am unable to connect.

"Unable to Connect We couldn't connect to the remote PC because the PC can't be found. Please provide the fully-qualified name or the IP address of the remote PC, and then try again. Error code: 0x104"

I'm not sure why I am now unable to connect. I tried a couple of things already but nothing works. I would appreciate if someone could help me figure this out! Also i am Dutch so if someone can explain in Dutch that would me lovely! Otherwise English will do.

Thanks.