The editor has encountered an unexpected error. // TypeError: Cannot read property ‘prefix’ of null

So,
I was researching this topic a bit deeper. All answers found on this SE suggested disabling Gutenberg with a plugin. This couldn’t be a valid “fix” in my oppinion.

After researching and browsing through the git issues of WordPress/gutenberg I’ve found a pretty easy solution for this problem.

The user joshuafredrickson on the git suggested changing the args of the custom post type array from 'public' => false, to true.

I have checked that fix on multiple of my clients projects and it has worked every single time.

Credits:

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