Problem:
The customer reported that it is not possible to edit the existing content templates and a particular WordPress archive, as the edit screen just shows the white blank screen.
Solution:
Guided that since WordPress 5.9, if using non-Toolset blocks (including core blocks) with dynamic sources in templates, Views, or custom archives, errors are thrown and it may not be possible to edit the page.
This will be fixed in the future release and a quick fix is to set the 'SCRIPT_DEBUG' constant to 'false' in the website's 'wp-config.php' file.
As for the archive, some of the data needed for its proper functioning was no longer available in the database, so it was unrecoverable, and suggested creating a new one.
Relevant Documentation:
https://toolset.com/errata/errors-when-using-3rd-party-blocks-with-dynamic-sources-since-wp-5-9-update/
