• Since a couple of days I get a warning message when I try to edit pages with Cornerstone. I figured out that the problem disappears when I deactivate Polylang.

    The warning message:

    The preview could not load due to the iframe response being incomplete. This is most often related to a plugin conflict, or customisations introducing a PHP error.
    Origin URL:https://www.lagrandeserve.com
    Preview URL:https://www.lagrandeserve.com/?lang=nl

    What can I do to solve this problem?

    Kind regards,

    Adriaan

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