Do you see the error "This block contains unexpected or invalid content" instead of your FullPage block?

License Settings

This error can appear after updating WordPress, Gutenberg, or even third-party plugins. But not to worry! The solution to it is quite simple.

In order to solve it, please, follow these steps:

  1. First, before doing anything, make a backup of your database. This is just for security reasons.
  2. Then use the Attempt Block Recovery button. This should solve the problem.

Careful! Do NOT click on the Convert to Classic Block option.

You might also find these articles relevant: