Updating failed. The response is not a valid JSON response.

  • There seems to be a conflict between WPSP 1.1.3 and NextGen Gallery 3.8.0.

    When both are activated, pages with WPSP shortcodes in them throw the following error notification upon page saves:

    “Updating failed. The response is not a valid JSON response.”

    This even happens on pages where a WPSP shortcode is the only thing present on the page.

    When WPSP is deactivated (w/NG active), the error goes away. When NG is deactivated (w/WPSP active), the error goes away.

    Saving pages with NG shortcode present and no WPSP present, does not generate the error.

    NG was previously installed on the site and not causing errors on save. Only after WPSP was installed that the errors began on pages containing WPSP shortcodes.

    Current environment is WP 5.7, GP theme 3.0.3, GPP plugin 1.12.3, PHP 7.4.16

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