Hello,
we recently updated to WP 3.9.1 and Zotpress 5.2.2 and i still encounter the problem.
On creating an account the validation doesn’t go through,
if i reload the page the account is being added but i can’t import anything. It’s endlessly loading and after a few seconds the “Sorry, but there was a problem syncing items: ” alert pops up.
I disabled all plugins and tried again, but nothing changed.