This worked for me:
https://www.advancedcustomfields.com/resources/google-map/#requirements
Note: this code crashed my site
function my_acf_google_map_api( $api ){
$api['key'] = 'xxx';
return $api;
}
add_filter('acf/fields/google_map/api', 'my_acf_google_map_api');
This code did work:
function my_acf_init() {
acf_update_setting(‘google_api_key’, ‘xxx’);
}
add_action(‘acf/init’, ‘my_acf_init’);
NOTE: When I went to edit the topic that was working all of my custom fields were missing.
They were also gone in the ACF plugin module. (This happened to me before.)
So I created new custom fields and everything seems to be working fine. All I can think is the function code that crashed corrupted the ACF.