How to Fix Error 503 When Connecting the OpenCart Extension

With some hosting providers, the NitroPack extension for OpenCart may fail to connect with the following error:

If you see this, please refer the issue to your hosting provider, and with the following message:

"We see an error 503 when trying to do a POST request, and passing the following fields:

• store_id
• site_id
• site_secret"

Your hosting should be able to fix this for you.