Page is not loading correctly in admin (Showing nttt and other characters).

Hi,

When I click on a page that was built with Site Origin blocks, I get a message that “This block contains unexpected or invalid content.” There is also a button that says “Attempt Block Recovery”. If I click “Attempt Block Recover”, loading icons appear and then nothing happens. You can see the example here:
https://www.dropbox.com/scl/fi/tb9at7sn5d55sh8oatnj2/image001.png?rlkey=34dlw0wkl72jru8acnv7sh8q2&st=6gv8xgpm&dl=0

Any help would be greatly appreciated.

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