Good day . I had the same problem, nothing worked in the program, only turning on vpn helped, I solved it like this: I found the “dns server” in the router settings and added 1.1.1.1. , 1.0.0.1. for trakt.tv and seriesguide restored 100% performance .
Welcome and thanks for sharing! If changing your DNS helps this means that your internet service provider (ISP) has a DNS block on these sites. Just as I suggested above.