Title: Error 520 Last modified: June 9, 2019 --- # Error 520 * Resolved [anitalianguy](https://wordpress.org/support/users/anitalianguy/) * (@anitalianguy) * [7 years ago](https://wordpress.org/support/topic/error-520-2/) * Hello everyone, it is my first time posting so I hope I am in the right section and I am asking the right questions. * Since this morning i have been experiencing an Error 520 on my website and this is what the log says: * ``` [09-Jun-2019 09:27:28 UTC] PHP Notice: Undefined variable: inlined_ccss_block in /web/htdocs/www.aliceceramica.com/home/wp-content/plugins/autoptimize/classes/autoptimizeStyles.php on line 885 ``` * I am not too experienced and tried both to deactivate Autoptimize (which I assume is causing this issue) and restoring the whole Autoptimize folder from a weekly backup. * Would you know how to get out of this situation? * Thank you * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-520-2%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 9 replies - 1 through 9 (of 9 total) * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [7 years ago](https://wordpress.org/support/topic/error-520-2/#post-11619809) * the notice is probably there because you activated “inline & defer” without having inline CSS being available, so deactivating “inline & defer” should fix that. * that being said, I would be surprised if that notice is the cause of the HTTP 520 error to be honest, as notices don’t stop PHP script execution. * hope this helps, frank * Thread Starter [anitalianguy](https://wordpress.org/support/users/anitalianguy/) * (@anitalianguy) * [7 years ago](https://wordpress.org/support/topic/error-520-2/#post-11619814) * Thank you for your reply. I don’t seem to be able to access the Admin page of my WordPress, would there be any way to deactivate it without accessing the admin? * Also, is there any error you may see (or file that I may send you) for you to check what is causing the issue? * Many thanks in advance once again for your prompt reply. * Thread Starter [anitalianguy](https://wordpress.org/support/users/anitalianguy/) * (@anitalianguy) * [7 years ago](https://wordpress.org/support/topic/error-520-2/#post-11619819) * Some other lines of error * ``` [09-Jun-2019 09:55:07 UTC] PHP Warning: include(): Failed opening '/web/htdocs/www.aliceceramica.com/home/wp-content/advanced-cache.php' for inclusion (include_path='.:/php7.2/lib/php') in /web/htdocs/www.aliceceramica.com/home/wp-settings.php on line 84 [09-Jun-2019 09:55:15 UTC] PHP Warning: include(/web/htdocs/www.aliceceramica.com/home/wp-content/advanced-cache.php): failed to open stream: No such file or directory in /web/htdocs/www.aliceceramica.com/home/wp-settings.php on line 84 [09-Jun-2019 09:55:15 UTC] PHP Warning: include(/web/htdocs/www.aliceceramica.com/home/wp-content/advanced-cache.php): failed to open stream: No such file or directory in /web/htdocs/www.aliceceramica.com/home/wp-settings.php on line 84 [09-Jun-2019 09:55:15 UTC] PHP Warning: include(): Failed opening '/web/htdocs/www.aliceceramica.com/home/wp-content/advanced-cache.php' for inclusion (include_path='.:/php7.2/lib/php') in /web/htdocs/www.aliceceramica.com/home/wp-settings.php on line 84 ``` * Thread Starter [anitalianguy](https://wordpress.org/support/users/anitalianguy/) * (@anitalianguy) * [7 years ago](https://wordpress.org/support/topic/error-520-2/#post-11619822) * The advanced cache file looks like this: * ``` '; } } if ( false == defined( 'WPCACHEHOME' ) ) { define( 'ADVANCEDCACHEPROBLEM', 1 ); } elseif ( ! include_once WPCACHEHOME . 'wp-cache-phase1.php' ) { if ( ! @is_file( WPCACHEHOME . 'wp-cache-phase1.php' ) ) { define( 'ADVANCEDCACHEPROBLEM', 1 ); } } if ( defined( 'ADVANCEDCACHEPROBLEM' ) ) { register_shutdown_function( 'wpcache_broken_message' ); } ``` * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [7 years ago](https://wordpress.org/support/topic/error-520-2/#post-11619931) * so this is more a problem with your page cache (which AO does not do) * it looks like PHP can’t load advanced-cache.php (a permissions-issue maybe). you can disable advanced-cache.php being loaded by removing `define('WP_CACHE', true);` from your wp-config.php file. and then try re-installing wp super cache maybe? * frank * Thread Starter [anitalianguy](https://wordpress.org/support/users/anitalianguy/) * (@anitalianguy) * [7 years ago](https://wordpress.org/support/topic/error-520-2/#post-11619956) * Tried and had this error instead * `[09-Jun-2019 11:32:10 UTC] PHP Warning: strpos(): Empty needle in /web/htdocs/ www.aliceceramica.com/home/wp-includes/plugin.php on line 658` * Odd situation all of a sudden. I should perhaps write the Super Cache guys too. * In the meantime thanks once again for your help and patience. * Thread Starter [anitalianguy](https://wordpress.org/support/users/anitalianguy/) * (@anitalianguy) * [7 years ago](https://wordpress.org/support/topic/error-520-2/#post-11619975) * Actually no, now no error at all in the log. Odd! * Thread Starter [anitalianguy](https://wordpress.org/support/users/anitalianguy/) * (@anitalianguy) * [7 years ago](https://wordpress.org/support/topic/error-520-2/#post-11620000) * For some mysterious reason I switched the Cloudfare icon from orange to grey on the website DNS and it worked! * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [7 years ago](https://wordpress.org/support/topic/error-520-2/#post-11620338) * very weird things anitalianguy, no idea how cloudflare & DNS were affecting your site, but happy is now works! 🙂 * have a nice Sunday-evening! frank Viewing 9 replies - 1 through 9 (of 9 total) The topic ‘Error 520’ is closed to new replies. * ![](https://ps.w.org/autoptimize/assets/icon-256X256.png?rev=2211608) * [Autoptimize](https://wordpress.org/plugins/autoptimize/) * [Frequently Asked Questions](https://wordpress.org/plugins/autoptimize/#faq) * [Support Threads](https://wordpress.org/support/plugin/autoptimize/) * [Active Topics](https://wordpress.org/support/plugin/autoptimize/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/autoptimize/unresolved/) * [Reviews](https://wordpress.org/support/plugin/autoptimize/reviews/) * 9 replies * 2 participants * Last reply from: [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * Last activity: [7 years ago](https://wordpress.org/support/topic/error-520-2/#post-11620338) * Status: resolved