Hi @Madson Lima Pinto welcome to the community. I'm able to Export PDFs on my Confluence page, and I checked the Atlassian Status Page and there aren't any reported issues.
Does this happen for all of your users? Have you tried a different browser or different PC? Does it still happen that way? Just exploring a bunch of troubleshooting options, have you tried rebooting your PC?
Is there anything consistent about the pages you're trying to export? If you create a new page with just a few words on it, does that export?
I don't see any existing Jira tickets (jira.atlassian.com) open for reported issues.
I see you have the free license, otherwise I'd suggest if you went through all those steps to contact support. Maybe some others have some more things to try.
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