Wrong reading of page when i send a link page

Hello i just paid for plus and i send to chat gpt a url with one page of documentation of a web framework and after that i ask things about the text inside of the url and answer with other information not sure where came from, because i asked where is taken that info and the answer is real time when i sent the link but is wrong, looks is answering with old content or maybe other information taken from other sites related to the framework, but is not capable to read a single page with info.

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