Cross-Origin Request Blocked

Hi!

I have been getting the following error at the browser console:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://mysite.cdn.net/wp-content/plugins/onesignal-free-web-push-notifications/sdk_files/OneSignalSDKWorker.js?appId=a610ea23-5a90-4876-bcf5-0755aa5be69e?sdkVersion=151510 (Reason: CORS header 'Access-Control-Allow-Origin' missing)

I tried to add the following instruction to my .htraccess file but it didn’t work (the error continues):

<IfModule mod_headers.c>
Header Set Access-Control-Allow-Origin "https://mysite.cdn.net"
</IfModule>

Is there anything I can do about it? The plugin seems to work normally.

Thank you.