The following errors were encountered:
* MyBB could not find the theme with the file you uploaded. Please check the file is the correct and is not corrupt.
Ive try'd 3-4 themes and it says that
I got it too...
And it isn't solved yet...
To those who have a problem with this, it must be something to do with your host, I've tested two .xml files that people have had problems with and they've imported fine for me, both on my localhost and my live site. Unless websitehelpers can share what they did to make it work...