Can you make a prtscrn of the error? Is there an error log (detaills?)

• maybe these pointers help?
• Check if firewall does not interfere
• export to same drive as x5 is on. (sometimes it does not work properly with remote or cloud drive)
• see that you have admin rights (right click mouse button, run as admin)

This is a prtscrn of the error. Did not see an error log.

try to debug a little;

change the save name to just test, save it to desktop, don't use any options, so remove the preview files tag.

try again.

does the project it self work correctly?

can you make a new project just for test and save that one, how does that go?

Can a project be exported to another computer using dropbox? When I try to attach it to an email as a iwzip file, it states the file is to large as it exceeds 25MB. 

the iwzipfile can be transported any way you like, so yes dropbox will work