Had problems with editing a post after upgrading to 4.5.0 while using Safari.
Switching to Chrome allowed me to edit the block contents (all were paragraphs).
However, Gutenberg also caused problems when trying to edit a Custom Post Type (not Gutenberg enabled).
Attempting to enter the old editor (TinyMCE) for the CPT gave me a “white page of death”, but with no PHP errors in the debug log and no errors/warnings in the JS console.
Inspecting the content of that white page indicates that Gutenberg is being loaded (for some reason), but I haven’t enabled Gutenberg support in the CPT registration.
The CPT is in a custom plugin I created.
This worked fine yesterday (while on 4.4.0) and stopped working immediately after upgrading to v4.5.0.
Deactivating Gutenberg gives me back the edit page for the CPT (and allowed me to edit the regular post blocks).
Re-activating Gutenberg and reloading the CPT Edit page results in the same blank page again.
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This reply was modified 6 years ago by Thomas S.