Im trying to add a datapack to my 1.17 Spigot server and cannot upload .json files or any files. When i attempt to upload files into the folder all the files appear to be in the folder for a few seconds with a loading icon, then vanish and a blue popup says "An Error Occured, Please try again" trying again does not work. I followed a minehut video on getting a datapack and everything works until uploading files, and i am doing it correctly the way the video shows. How to fix?