wp-config.php file in your server/website and add this config to it. Don’t forget change
xxxxxxxxxxx with your config. This file is located in the root of your WordPress file directory and contains your website’s base configuration details, such as database connection information.
define( 'MOBILE_BUILDER_ONESIGNAL_APP_ID_STORE_MANAGER_APP', 'xxxxxxxxxxx' ); define( 'MOBILE_BUILDER_ONESIGNAL_API_KEY_STORE_MANAGER_APP', 'xxxxxxxxxxx' );
Need help on how to generate above config? Click here