Failed to load resource: the server responded with a status of 500 (Internal Ser

The CSS optimizer can occasionally choke on specific CSS (due to PCRE -which is in PHP for regular expression execution- causing a stack overflow).

As per the FAQ you can switch to the legacy minifiers, of which CSSmin is less prone to such crashes. alternatively you can try to identify the CSS at fault and exclude that from optimization.

hope this helps,
frank

Hey Frank, thanks for the info provided. I tried to switch to legacy minifier (same error) but I realised that JS is also not loading-“Internal Server Error”

Looks like the resources aren’t loading when the plugin is activate.

Do I maybe need to setup something else because of the CDN on this server?

This is how my settings looks:

https://awesomescreenshot.com/090574b120

Thanks ??

in general, if you have internal server errors on all optimizations, this is caused by another plugin trying to do minification as well. so go over the entire list of plugins and see if anything might also do minification. if need be briefly disable all plugins and activate the one by one to find out which one might be causing issues here.

the only difference is the server that is working fine doesn’t have AWS cache activated.

could you disable AWS cache (is that a plugin?) for a second and see if that fixes things?

frank

Hey Frank!

Tried disabling all the plugins and the problem persists ??

This is the error that I see in dev tools https://www.dropbox.com/s/fwlvcrjvomvq7zf/Screenshot%202015-09-01%2009.28.54.png?dl=0

AWS-Amazon web services

Any other ideas please? Thanks!

ok. the error-message doesn’t show any relevant info though … some more questions;
* is “aws cache” something you can disable somehow?
* do you have access to the php-error-log? anything in there?
* can you also switch to a default theme (i.e. no plugins but AO on a stock wordpress theme)?

frank

OK, tried with the default theme-same issue appears.

I’ve contacted my client to see if he can disable AWS so I can see the behaviour of AO plugin.

And this is the log output, I believe there is nothing related to the AO plugin there:

[01-Sep-2015 08:08:44 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:44 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:44 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:44 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:44 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:44 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:44 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:44 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:44 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:44 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:44 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:44 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:46 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:46 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:46 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457
[01-Sep-2015 08:08:46 UTC] PHP Notice:  The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /var/www/wp-includes/functions.php on line 3457

Some advice how to solve this? ??

sorry, double post

no, nothing relevant in the php error log. does the problem also arise when only having HTML optimization?

No, I do not see any errors when HTML optimisation is enabled.

ok, so only CSS & JS. any indication there is already minification taking place, even with AO deactivated?

frank

Yep, only CSS and JS are reporting the error. No minification on sight, all the plugins disabled and checked is there minification on css or js and made sure there isn’t.

could you share the URL (in a mail, if you prefer; futtta-at-gmail-dot-com)?

Update: This turned out to be an Apache problem, with the default Ubuntu Apache config not allowing requires in .htaccess, breaking AO’s .htaccess and resulting in HTTP 500 errors. Updating Apache to allow requires fixed the problem.

frank

I want to thank Frank this way also for taking the time to go through this issue with me. I updated the apache2.conf and added the following code and this solved my problem:

<Directory /var/www>
        Options Indexes FollowSymLinks
        AllowOverride None
        Require all granted
</Directory>

Frank, you are an awesome person, thanks!