Cant import in version 13 site made by version12 
Author: Branko P.
Visited 1365,
Followers 2,
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https://helpcenter.websitex5.com/post/155940
I have the same problem. 97%... I belive that the site is to big.
Posted on the
Duplicate post... please continue on the original where Claudio is awaiting your reply:
https://helpcenter.websitex5.com/post/155130
Many thanks!