Private App not connecting with Shopify API

[CutPriceBlinds]

Hi,

We have developed a Private App to connect with Shopify’s API.

The Private App and it’s Database are both hosted on AWS.

However, the Private App and Shopify are not connecting with each other.

Shopify Store:
https://cut-price-blinds-online-store.myshopify.com/

Private APP (currently on AWS Server):
http://54.252.170.39/shopi/

Does anyone have any suggestions what might be causing them not to connect?

Thanks!

[Jason]

"Not connecting" is a very vague comment so will need more info.

Are you seeing an error or have any other context to add?