I wanted to clone my offline test site (localhost with XAMPP) to a live subdomain on our Web hosting service. I've used WP Clone previously and it's always worked well. This time, however, I received the following message:
The plugin encountered an error while downloading the zip file, the following error message was returned:
Error Message: A valid URL was not provided.
Temporary files created in /home/xxxxxxx/public_html/xxxxx/wp-content/wp-clone-temp will be deleted.
I was able to fix the problem by following directions supplied in another post here. I simply copied the WP Clone zip backup file from the offline site into the same location on the new, live, subdomain. I then used the restore from backup feature once again, from the live subdomain site, and this time it worked. The offline test site was successfully cloned to the new, live, subdomain location, and everything (plugins, widgets) work as intended.
On a related note, it is good to know that, at least in my experience, WP Clone works well with WP version 3.7.1. It's a great product, in my opinion.
If anyone else knows of a better way of handling this issue (or of a way of avoiding this problem), please post relevant information. Thank you!