403 error when attempting to update a page

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Hi, when I’m trying to save this page https://mirhage.it/en/furnishing-accessories/ with just some more lines of text added to the last section “Custom Products” I get a 403 server error (screenshot https://snipboard.io/NG3J1g.jpg ).

If I remove the additional lines, it saves normally.
On Elementor page https://elementor.com/help/publish-update-button-not-work/ it says:

403 error when attempting to update a page: This can be due to a security plugin such as WordFence and others. To sort this out, activate the learning mode of this plugin or contact their support. 

So I tried both enabling learning mode and completely disabling Wordfence firewall, but kept getting the same 403 error.

When I translated the same page in French (before translating it in English) I didn’t get any error https://mirhage.it/fr/complements-dameublement/. The 2 pages are exactly the same lenght. Then, when working on the English version I got this error.

I also sent a report by email to give you more info.

Can you help me?

Thanks in advance for any help,
Alessandra.

The page I need help with: [log in to see the link]

 

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