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Hi,
Does anybody here know what this warning mean?
“Warning: array_merge(): Argument #2 is not an array in /wp-includes/load.php on line 63”
This happened when I tried to switch my website’s PHP version from PHP 5.6 to PHP 7.1. It doesn’t seem to appear on PHP 7.0 though. I’ve already tried a lot of things like deactivating all of my plugins as well as switching my theme back to 2017 but it is still displayed on my website.