Zotero www.zotero.org refused to connect.

Hi everyone,
I'm trying to connect to zotero from this site with marklet, but I'm getting an error and can't go further.
what do you think is the problem?

Can you help me ?

Error image link
https://www.dropbox.com/sh/1w83zuil14etaul/AACym-QmY4T9nYUs86skhOhoa?dl=0
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