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Elements cannot be added to Body elements

hello and thanks for helping me. I have a problem with one of the CMS collection Template pages. When I try to add any element inside the Body of the page, a message appears "Elements can not be added to Body elements … it is impossible to insert a div blok, container or any other element inside the body, this error only appears on that page and I have noticed in the section “navegation” the Body element is purple, can you help me solving this BUG?

I leave you the ink of a video where you can see the problem

Here is my site Read-Only:

A post was merged into an existing topic: Problem add elemento to Body in CMS page