Problem with image series in a cloned photo contest

I have a photo contest with submission categories. I added a photo series to one of the categories and made some single photo submissions to the other 2 categories. Then I cloned the PollUnit. I found that in the clone, whenever I try to click on any button for the category with the series, either nothing happens of I get redirected to a 502 Bad Gateway page.

It seems that there is a bug in our cloning feature when this combination of options is used. We will fix this shortly and let you know here once the update is available.

Our latest update should fix this bug. Could you try again?