Embedded app refused to connect to abcd.myshopify.com refused to connect.

[FaisalSaleem_]

I have developed a Shopify sales channel app and it is showing the error when I open my app in Shopify (embed)

abc.myshopify.com refused to connect.

Few weeks ago I faced this issue and I have fixed that issue by changing the app URL and again updating the same URL

I attached the screenshot of the store.