Title: Autoptimize 502 error Last modified: January 4, 2018 --- # Autoptimize 502 error * Resolved [luito](https://wordpress.org/support/users/luito/) * (@luito) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/) * Many days ago i have de same problem on all my sites. The plugin crashes when i go to the **“main tab”** and in the **“Optimize More tab”** I dont have php errors in my logs. both URLs: /wp-admin/options-general.php?page=autoptimize / wp-admin/options-general.php?page=ao_partners Can you help me?. Thank you. - This topic was modified 8 years, 4 months ago by [Jan Dembowski](https://wordpress.org/support/users/jdembowski/). Reason: Fixed broken formatting * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fautoptimize-502-error%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 15 replies - 1 through 15 (of 32 total) 1 [2](https://wordpress.org/support/topic/autoptimize-502-error/page/2/?output_format=md) [3](https://wordpress.org/support/topic/autoptimize-502-error/page/3/?output_format=md) [→](https://wordpress.org/support/topic/autoptimize-502-error/page/2/?output_format=md) * Thread Starter [luito](https://wordpress.org/support/users/luito/) * (@luito) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9831634) * i found this error on wordpress logs **Undefined index: autoptimize_extra_checkbox_field_0 in /wpfiles/current/incatrail/wp-content/plugins/autoptimize/classlesses/autoptimizeExtra. php on line 290** * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9831638) * OK, some questions [@luito](https://wordpress.org/support/users/luito/); * what version of Autoptimize are you on? * did this work before? * if it worked before, when did it break? * does your host(er) by any chance stop reqeusts to the outside world (AO fetches an RSS-file to populate the “optimize more”-tab? * (the undefined index one is harmless and has been fixed on the development build already, will be part of AO 2.3.2. if you want you can [download the update from github here](https://github.com/futtta/autoptimize/archive/master.zip)) * frank * Thread Starter [luito](https://wordpress.org/support/users/luito/) * (@luito) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9831801) * Hello Frank. Thanks for your answer. I use the last version of the plugin. My problem come in the last wordpress version. and i saw this when upgrade the last version of Autoptimize. I dont know why is working “extra tab” of the plugin and others doesnt * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9832971) * [@luito](https://wordpress.org/support/users/luito/) some more questions (as I honostly have no idea what is causing this); * can [enable WP_DEBUG as per these guidelines](https://codex.wordpress.org/WP_DEBUG) to see if you get more info on the problem? * can you deactivate AO, delete it and then reinstall? * if that does not work, can you [download the previous version of AO](https://downloads.wordpress.org/plugin/autoptimize.2.2.2.zip) and see if that “fixes” it for you? * frank * [nechry](https://wordpress.org/support/users/nechry/) * (@nechry) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9833630) * I got same issue since last update. I currently disable the Autoptimize plugin and no more 502 error. With the previous version I never got this issue. * Thread Starter [luito](https://wordpress.org/support/users/luito/) * (@luito) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9833685) * Hello Frank. I found the problem, is a conflic between W3 Total Cache plugin and Autoptimize. Still I cant fix. * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9833689) * ah … are all W3TC minification options deactivated? * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9833714) * just installed W3TC and ticked almost all options, but still can’t reproduce I’m afraid. * [nechry](https://wordpress.org/support/users/nechry/) * (@nechry) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9833752) * from my side I don’t have the W3 Total Cache plugin, but other cache plugin: WP Super Cache * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9833761) * me too [@nechry](https://wordpress.org/support/users/nechry/), no issues there either. I’m afraid I’m completely in the dark here, can you provide me with feedback on [my questions here](https://wordpress.org/support/topic/autoptimize-502-error/#post-9832971)? * [nechry](https://wordpress.org/support/users/nechry/) * (@nechry) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9833867) * @ optimizingmatters as you proposed, I deactivate AO (this step already done), delete it and then reinstall. * from now I did not got the error 502, so wait and see. Last time in 5 minutes I got the error and a restart nginx is not enough to resolve I always have to reboot the host. * Thread Starter [luito](https://wordpress.org/support/users/luito/) * (@luito) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9833887) * Minify module is desactivated. I found the problem maybe is a error in object cache from W3 total cache. Something in the update from WordPress, Autoptimize or W3 total cache. I working to find the problem. * [nechry](https://wordpress.org/support/users/nechry/) * (@nechry) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9833914) * Since I previously have the issue, I get this entry in my log file: 2018/01/ 04 06:48:33 [error] 10856#10856: *784773 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 51.15.xx.xx, server: mysite.com, request: “GET /?ao_speedup_cachebuster=34252 HTTP/1.1”, upstream:“ fastcgi://unix:/run/php/php7.0-fpm.sock”, host: “mysite.com”, referrer: “[https://mysite.com/?ao_speedup_cachebuster=34252”](https://mysite.com/?ao_speedup_cachebuster=34252”); * refer to log /var/log/nginx/mysite.com.error.log.1 * ever and ever * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/#post-9833941) * ah, but that is an error I know of (and which is fixed on the development version) [@nechry](https://wordpress.org/support/users/nechry/). I bet you’re using an external object cache (redis or memcached)? try [this zip file (github) which has a fix for that](https://github.com/futtta/autoptimize/archive/master.zip) and let me know if that fixes things. * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/page/2/#post-9833966) * the developement version is now also available [from the wordpress.org repo](https://downloads.wordpress.org/plugin/autoptimize.zip). Viewing 15 replies - 1 through 15 (of 32 total) 1 [2](https://wordpress.org/support/topic/autoptimize-502-error/page/2/?output_format=md) [3](https://wordpress.org/support/topic/autoptimize-502-error/page/3/?output_format=md) [→](https://wordpress.org/support/topic/autoptimize-502-error/page/2/?output_format=md) The topic ‘Autoptimize 502 error’ 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/) * 32 replies * 3 participants * Last reply from: [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * Last activity: [8 years, 4 months ago](https://wordpress.org/support/topic/autoptimize-502-error/page/3/#post-9852108) * Status: resolved