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WordPress 5.6 PHP Warning re: array_intersect_key()

    • graphix

    • December 10, 2020 at 9:00 am

    After updating to WordPress 5.6 I’m getting the following error while editing Pages in the Admin:

    PHP Warning: array_intersect_key(): Expected parameter 1 to be an array, string given in /home/path/to/my/wordpress/install/wp-includes/rest-api/class-wp-rest-server.php on line 1402

    I’ve tried deactivating all plugins except for ACF and the error persists. I also tried switching to Twenty Twenty-One and the error still sticks around. Furthermore, once I deactivate ACF, the error disappears.


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