In the file metabox.js, found in the neve/assets/js/build/all folder, a depricated jQuery function is found. The function is deprecated in 2012!
You should replace the part .load(function(){jQuery.neveMetabox.init()})}(); with .on(“load”, function(){jQuery.neveMetabox.init()})}();
Please come with an update of the theme for this and check the rest of the code too. WordPress 5.5 changes a lot on the jQuery side. You better prepare your Theme for that, even if the Theme is free. Thanks.
