I then backed up several of our course webs as .imscc files and received the same error when I tried to restore them. Additionally, the company that provided the file tested it on their Moodle instance and mentions having a button to convert the .imscc file to a Moodle file. My instance does not have this button/option. Additionally, I cannot find any settings for adding it in on the administrative level.
Does anyone know if this version had a bug that prevents the .imscc file upload or if there is something that might specifically need to be turned on our fixed on our site to have this option added? Unfortunately, an upgrade is not possible for us until summer. So, here is to hoping that is not the only solution.