How to fix: “Every call to the add_setting() method needs to have a sanitization”
Some time ago WordPress.org is changed the rules of the publication of a themes to their repository. And then, I have not been able to publish update of my theme, because of the following error: REQUIRED: Found a Customizer setting that did not have a sanitization callback function. Every call to the add_setting() method needs to have a sanitization callback function passed.
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