Support » Plugin: Hummingbird – Optimize Speed, Enable Cache, Minify CSS & Defer Critical JS » Hummingbird plugin compatibility in Pantheon

  • Resolved Carl Alberto


    Hi Hummingbird plugin support,

    First of all, awesome plugin that you have here and we have seen a lot of neat features that you have in the plugin to improve a site’s page speed ratings.

    We would like to reach out and explore the possibility of collaborating in making this plugin optimally work in the platform.

    We have a couple of points that we need to be clarified:

    1) Due to Platform’s architecture where the live site’s writable path is only on wp-content/uploads, we are getting this error:

    Warning: mkdir(): Permission denied in /code/wp-content/plugins/wp-hummingbird/core/class-logger.php on line 184 Warning: fopen(/code/wp-content/advanced-cache.php): failed to open stream: Permission denied in /code/wp-content/plugins/wp-hummingbird/core/class-filesystem.php on line 512 Warning: fwrite() expects parameter 1 to be resource, bool given in /code/wp-content/plugins/wp-hummingbird/core/class-filesystem.php on line 513

    Any paths that you recommend that need to be writable? Or do you have any settings to override it to wp-content/uploads?

    2) We saw that there are settings to override the web server’s settings but unfortunately, it cannot be overridden in Pantheon, is there any way to disable this setting? Is this just setting the header’s max-age? We were wondering if it can be disabled and it can still work with the default cache plugin that we have ?

    Thank you in advance!

    Carl A.
    Pantheon Customer Success Engineering Team

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  • Hey @carl-alberto,

    Thank you very much for your kind words on Hummingbird, we really appreciate them :).

    For sure, we can definitely work out something together to improve the compatibility with Pantheon. I think an email would be better here to get you and your team in touch with our developer so please contact me at and we can continue the conversation over there.

    Kind regards,

    Thread Starter Carl Alberto


    Thanks for the reply @erickfogtman, sent you an email, and happy to move forward things from there 🙂

Viewing 2 replies - 1 through 2 (of 2 total)
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