Hello and thank you for the follow-up.
The problem remains. It is very likely that you did not follow the previous exchanges before I opened this link again, as suggested by your colleague, Mehtaz Afsana
https://www.joomshaper.com/forum/question/35959
To put it simply. In the LATEST ONE section: the current configuration is Badge---Thumbnail--- Title---Price.
If I add the addon: Add to cart to this configuration, it is no longer possible to save.
Try to do the test yourself and you will understand better.
Thank you for your support!