Problem with HTML embedded code

I’m experiencing an issue with an embed code on my Wix site. Let me explain: I have some pages with embedded chats from the Xat.com website, incorporated using HTML code. It turns out that something is restricting my access, I can’t log in to chats on my Wix website. On other Wix sites or on the Xat site itself, login is normal. The problem is explicitly related to my Wix site. I can’t connect. I believe it could be something related to the cookie policy, but I don’t know how to resolve it. Would there be another possibility? How to solve?