Hide WP Version feed error

[mehul0810]

Bug Report

Whilst running wget, I came across HTTP 500 errors being generated by WordPress when crawling RSS pages such as /feed :

<channel>
	<title>Thai Cookery</title>
	<atom:link href="http://thaicook.local/feed/" rel="self" type="application/rss+xml" />
 ...
	<sy:updateFrequency>
	1	</sy:updateFrequency>
	<error>
    <code>internal_server_error</code>
 ...

A working feed typically outputs the generator tag next, i.e. something like:

https://wordpress.org/?v=5.9.2

In the General settings I had checked ‘Hide WP Version’. When I unchecked, the error disappeared, so that suggests the error lies there.

Related

https://wordpress.org/support/topic/hide-wp-version-feed-error/

Acceptance Criteria

• e.g. Something happens when an action is taken.
• e.g. Something does not happen when an action is taken.
• e.g. Fixing behavior in Component A does not affect existing behavior in Component B.

[John-mitchell-56]

New user for the plugin but just to confirm that this is still happening under WP v6.8.1 and PHP 8.3

Like the OP, I tested this by disabling the "hide WP version" and the rss feed generated, enabled the "hide WP version" and got the server error.

If it helps the log file entry was :

[Tue Jun 10 15:56:23.978741 2025] [proxy_fcgi:error] [pid 170957:tid 170957] [client 2a02:390:8765:0:e0d4:4c86:10bd:c5cd:54170] AH01071: Got error 'PHP message: PHP Fatal err or: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "" not found or invalid function name in /xxx/xxx/xxx/blog/wp-includes/class-wp-hook.php:326\nStack trace:\n#0 /xxx/xxx/fxxx/blog/wp-includes/plugin.php(205): WP_Hook->apply_filters()\n#1 /xxx/xxx/xxx/blog/wp-includes/general-template.php(5123): apply_filters()\n#2 /xxx/xxx/xxx/blog/wp-includes/class-wp-hook.php(324): the_generator()\n#3 /xxx/xxx/xxx/blog/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()\n#4 /xxx/xxx/xxx/blog/wp-includes/plugin.php(517): WP_Hook->do_action()\n#5 /xxx/xxx/xxx/blog/wp-includes/feed-rss2.php(83): do_action()\n#6 /xxx/xxx/xxx/wp-includes/template.php(810): require_once('...')\n#7 /xxx/xxx/xxx/blog/wp-includes/functions.php(1678): load_template()\n#8 /xxx/xxx/xxx/blog/wp-includes/class-wp-hook.php(326): do_feed_rss2()\n#9 /vaxxx/xxx/xxx/blog/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()\n#...'