I use JCore CMS, I create 1 template and compress folder with 7-zip to be tar.gz and I upload it then message appear, "Template couldn't be extracted! Error: Invalid template! Please make sure to upload a valid tar.gz template file." "There were problems uploading some of the templates you selected. The following templates couldn't be uploaded: blog.tar.gz." How can I create compressed file with format JCore CMS ? Thanks for advance. pathic myee.web.id