Models always T-Pose

Sorry if this isn’t the right section, but there’s no where else to post it. Every Model I DL and put on my server, it’s a t-pose. 100% of the time it is. I get on another server and it’s perfectly fine. But once i’m on my own, it’s t-posing. I have both materials/models in the server and client. Once again, sorry for posting it here if it was the wrong section. Google’d and found NOTHING over this topic.