Cause Tab where error is located to be focused in ACF

acf-focust-tab-on-validation-error.js

acf.add_filter('validation_complete', function( json, $form ){
	if(json.errors) {
		var field = jQuery('[name="' + json.errors[0].input + '"]', $form).parents('.acf-field');
			field = field[field.length - 1];
		var tab = jQuery(field, $form).prev('.acf-field-tab').attr('data-key');
		jQuery('.acf-tab-wrap a[data-key=' + tab + ']', $form).click();
	}
	return json;
});