Reply To: ACF Google Maps callback error

• Youdaman

• February 9, 2023 at 5:55 am

I came across the same issue just now. Turns out that in wp-content\plugins\advanced-custom-fields-pro\includes\fields\class-acf-field-google-map.php the callback param is set to an empty string:

			// vars
			$api = array(
				'key'       => acf_get_setting( 'google_api_key' ),
				'client'    => acf_get_setting( 'google_api_client' ),
				'libraries' => 'places',
				'ver'       => 3,
				'callback'  => '',
				'language'  => acf_get_locale(),
			);

Just below this there’s a filter we can use to override these params:

			// filter
			$api = apply_filters( 'acf/fields/google_map/api', $api );

I found a post on Stack Overflow that suggests setting the callback param to Function.prototype, see https://stackoverflow.com/a/75212692

This fix works for me:

add_filter('acf/fields/google_map/api', function ($api) {
    $api['callback'] = 'Function.prototype';
    return $api;
});