Terraria LAN connection issue

So me and my Sister were playing Terraria (1.4.1.1)via the LAN connection just fine, Until it randomly stopped working and now whenever we try to connect to each other’s worlds we get stuck on the forever connecting screen..

We made sure that Terraria was allowed through the Firewall, We ran a couple of Virus scans and we
tried reinstalling it but it was all to no avail..

I’m hoping that we can find an answer to this annoying problem and return to our Terrarian world.