eBay requires you to upload a .txt file so that you can provide an address like http://www.yourdomain/epndomain.txt for verification. Unfortunately, this area is not accessible on Yola.
If you upload the file to your File Manager on Yola, you will be able to submit an address like this: http://www.yourdomain.com/resources/epndomain.txt, but this isn't something that eBay can accept.
eBay does offer this alternative on their support pages, for more information on this please see this link in our forum: eBay Partner Program.