How to get past the “This block has encountered an error and cannot be previewed” error
The issue with the blocks not previewing or being editable might be due to a compatibility concern with the Gutenberg editor and WordPress version you’re using (e.g. WordPress 6.4).
The first option to try if you’re running WordPress 6.4 is to deactivate the Gutenberg plugin, as this might no longer be needed in this newer version of WordPress.
Alternatively, as mentioned in the Theme Requirements, to ensure smooth functioning with our theme, please check that you are running Gutenberg version 15.5.0 and WordPress 6.2.x.
Updated on November 27, 2023