Events folder contents not loading

Plone raises an error Circular reference detected, see example: https://dust03.bsc.es/prefs_error_log_showEntry?id=1733927310.54993410.8302165676253108

The same error is happening in all these cases:

• When accessing pages 3 and 4 of the /resources folder (if the num items per batch is the default one, 15)
• When accessing page 2 of the /research folder

I have not been able to reproduce this error in my machine. I have imported the research folder and it works and I have imported the first 15 contents of the events folder and it works too.

It seems to be related with the custom content types that are stored in those folders because this error was happening in the Plone root folder until the webinars, events and news were moved to the proper location (/news-events/events and /news-events/events).