Guests can't post

Good morning again, bellow is a copy of my previous ticket - it's the same problem with the problem persisting.

Appreciate all the possible help, please.

Thank you!

Good morning,

I'm having a problem on site in which registered users can post comments, but when a Guest tries to post it returns the following error: "SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data"

Can you check this? please.

Thank you!

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