问当我将普通页面重定向到AMP页htaccess错误时，将出现500内部服务器错误

EN

<meta name="original-source" content="https://www.themobilesapp.com/<?= $abc; ?>">
<link rel="canonical" href="https://www.themobilesapp.com/<?= $abc; ?>">
<link rel="amphtml" href="https://www.themobilesapp.com/ampspecification/<?= $abc; ?>">

Options +FollowSymLinks -MultiViews -Indexes

<IfModule mod_rewrite.c>

DirectoryIndex index.php

RewriteCond %{HTTP_HOST} ^themobilesapp.com$ [NC]
RewriteRule (.*) https://www.themobilesapp.com/$1 [R=301,L]

RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

RewriteCond %{REQUEST_FILENAME} !-d 
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteRule ^(.*)$ $1.php

ErrorDocument 404 404error.php

RewriteRule ^([A-Za-z0-9-]+)$ specification.php?abc=$1 [L]

RewriteRule ^news/([A-Za-z0-9-]+)?$ news.php?abc=$1 [L]

RewriteRule ^ampnews/([A-Za-z0-9-]+)?$ ampnews.php?abc=$1 [L]

RewriteRule ^profile/([A-Za-z0-9-]+)?$ profile.php?id=$1 [L]

</IfModule>