Unable to upload templates

Feb 18, 2014 at 4:26 PM
For some reason I an unable to upload templates to my forum.
It continues to give me the error File format is invalid. Please include only the allowed files.

Structure:
template.html
screenshot.png
template-contents folder

I've even tried downloading the sample template and just rezipping up and trying to upload it and it continues to give me a file format error.

Any ideas?