期待已久的 WordPress 5.9在2022.1.25終於來了，支持整站編輯，剛更新就發生了最重要的編輯器不能打開的問題。折騰了一番，終於找到問題所在，謹記下以備忘。
之前，參考某站的優化措施 (https://free.com.tw/wordpress-optimization-guide/)，其中一條是“移除掉不必要的查詢參數”，在 「.htaccess」中加入了以下幾行：
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{QUERY_STRING} !=””
RewriteCond %{QUERY_STRING} !^p=.*
RewriteCond %{QUERY_STRING} !^s=.*
RewriteCond %{REQUEST_URI} !^/wp-admin.*
RewriteRule ^(.*)$ /$1? [R=301,L]
</IfModule>
只要在「.htaccess」中把這幾行去掉後，問題就解決了。
官網討論區有相關的話題（https://wordpress.org/support/topic/anyone-try-the-twenty-twenty-two-theme/#post-15331006）。該話題經詳細討論，大致是關於把wp安裝在子目錄中產生的問題。最後得以解決：https://wordpress.org/support/topic/anyone-try-the-twenty-twenty-two-theme/page/2/
摘錄如下：
Hello everyone,
my hosting provider kinda solved the issue adding the following line:Header always set Content-Security-Policy "upgrade-insecure-requests;"
in subfolder’s .htaccess (outside BEGIN/END WordPress of course).
So, just to summarize the things to check (most of them are obvious):
- You should specify your subfolder in root’s index.php require statement
require __DIR__ . '/(your_subfolder)/wp-blog-header.php'; - Root’s .htaccess should be left as it is when WP creates it.
- Subfolder’s index.php should not have the
/(your_subfolder)part in its require statement. - Subfolder’s .htaccess should contain the line I mentioned at the beginning.
- In WP Settings > General you should state your subfolder’s name in WP’s URL and not state it in website’s URL (as you normally would with a subfolder installation).
For those interested in delving into the .htaccess statement, here’s MDN link.
Cheers!
有人用 http 就能正常，用 https 就出錯，有這方面問題的可以試試朝「混合安全和非安全內容在同一網頁」這方面想想，或去這裡看看： install plugins that automatically redirect all the we HTTP requests to HTTPS requests
我也試過在Chrome安裝過某些油猴插件(Tampermonkey Plugin)導致白頁，可以先把Chrome 的所有插件包括Tampermonkey關掉，也許就能解決問題。
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