Failed to load resource: the server responded with a status of 502 (Bad Gateway)

[dran007]

Installed the matomo analytics 4.3.0 plugin on Azure web app, get the error below from the Reporting screen. Not able to load the stylesheets. Please advice.

Failed to load resource: the server responded with a status of 502 (Bad Gateway)

502 - Web server received an invalid response while acting as a gateway or proxy server. There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server.

[tsteur]

Hi @dran007 sorry about that. Is there any chance you could create a user for us on your WordPress? If so, could you create a user with the "Matomo Super User" role for [email protected]? This way we would be only able to access the Matomo part in your WordPress but nothing else.

Generally it sounds like some web server configuration issue. I know that some users use it on Azure without any issues but it may depend on the web server you are using. Any chance you are familiar with web servers @dran007 ?

[dran007]

Yes. Thanks for the response. Not sure how can you help if I add you as a Matomo super user. I installed this plugin in another Wordpress hosted in Bluehost out side of Azure env, I didn't see this issue. Only see this issue on Azure web app env. I checked the chrome console on this page, seeing this returned. /wp-content/plugins/matomo/app/index.php?module=Proxy&action=getCss&cb=aaba7d0e8279316b5c71048666f70841 Request Method: GET Status Code: 502 Bad Gateway Remote Address: xx.xxx.xxx.xx:443

Somehow the proxy action failed to 'getCss&cb=aaba7d0e8279316b5c71048666f70841', the stylesheet.

[tsteur]

Hi @dran007 could you maybe try and see if the file loads when you request only /wp-content/plugins/matomo/app/index.php?module=Proxy&action=getCss without the cb parameter?

Any chance you could check the web server logs if there is more information provided about this error?

[dran007]

I have tried that, getting the same error. Check the web sever logs, saw many HTTP502.3 Bad Gateway response. Failed Requests by URI /wp-content/plugins/matomo/app/index.php

I also set this log in the config.ini.php, but didn't see the matomo.log file in the /matomo folder configured below.

[log] log_writers[] = "file" log_level = "WARN" logger_file_path = "home/site/wwwroot/wp-content/cache/matomo/matomo.log"

[tsteur]

@dran007 Matomo for WordPress actually uses the WordPress WP_DEBUG logging and the log writers shouldn't be used. You could try and enable WP_DEBUG to check if anything gets logged: https://wordpress.org/support/article/debugging-in-wordpress/#wp_debug

It seems either PHP or the web server is timing out. I don't know if WordPress would log anything if PHP times out but may be worth trying.

Otherwise, if any possible, are you or a system administrator maybe able to increase the timeout limits in PHP and/or your web server?

[mattmary]

Hi @dran007

Do you still experiment this issue with the latest plugin release?

Kind regards

Mat

[mattmary]

Hi @dran007

Without any answer, I close this issue. Feel free to open a new one if you still encounter some issues with our plugin. Kind regards

Mat