Yes I think I am having the same issue. I recently upgraded my server and all the old clients seem to be connecting fine, but when I install new clients they just sit there at the XIBO screen and never go anywhere. I cannot send content to them or schedules to them.
My screen just looks like the following;
I do see one error there in the console but after doing a bunch of reading I dont think its related to the XIBO problem.
Any help is appreciated if anyone else is having this issue