[wp-trac] [WordPress Trac] #56755: Error for theme customize or blank page for site editor in WordPress installed in subdirectory but accessed from root

[WordPress Trac]

#56755: Error for theme customize or blank page for site editor in WordPress
installed in subdirectory but accessed from root
--------------------------+-----------------------------
 Reporter:  noyle         |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Customize     |    Version:
 Severity:  normal        |   Keywords:
  Focuses:                |
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 The background is that:
 0. WordPress 6.0.2.

 1. WordPress is installed in a subdirectory, e.g.,
 https://www.example.com/wordpress .

 2. It's accessed from root, e.g., https://www.example.com/. The
 configuration used is "Method II" on page
 https://wordpress.org/support/article/giving-wordpress-its-own-directory/
 .

 3. All admin pages and customized slugs can be correctly accessed from
 URLs via the root path.

 The errors I have are:
 1. If using themes 2020 or 2021, using Customize under the Appearance
 menu, the page will finally say "You need a higher level of permission.
 Sorry, you are not allowed to customize this site.".

 2. If using theme 2022, using the "beta" Editor under the Appearance menu,
 the page is blank. When I opened F12 the developer tools screen, switched
 to network tab and refreshed the page, the following 3 requests are red:
 {{{
 /wp-json/wp/v2/blocks?context=edit&per_page=100&_locale=user
 /wp-json/wp/v2/settings?_locale=user
 /wp-json/wp/v2/templates/twentytwentytwo//home?context=edit&_locale=user
 }}}
   All of them were responded with the following message:
   {{{
 {"code":"rest_cookie_invalid_nonce","message":"Cookie check
 failed","data":{"status":403}}
   }}}
   Refer to the attachments for the above messages.

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Ticket URL: <https://core.trac.wordpress.org/ticket/56755>
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