Hi, @Touris Jade
Thank you for posting in Microsoft Q&A forum.
Like the message said, a required component of the console is out of sync with your site, do you have any component keeps open when you upgrade the SCCM console, I have seen this message because I keep the Configuration Manager Service Manager open, after I close it, the issue fixed.
Anyway, you may also try to restart the server like Prajwal mentioned to see if it helps.
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