How can I resolve the blocked mixed content issue in Safari?

[Shubham_proto]

Hi All,

I have created an app in Laravel using Osiset Package. My app is working fine except the Safari browser and iPhones. I am getting following error:
Blocked mixed content t http://app_name.herokuapp.com/authenticate/token?shop=test-dash-discount.myshopify.com&target=%2Fhom... block-all-mixed-content' appears in the Content Security Policy.

My App is hosted on Heroku and it is also in production. Here is the link of my production app. 
https://apps.shopify.com/dash-discounts

Here is the screenshot of issue:

Please help me to fixed this issue.

[normrockwell]

Were you able to solve this issue? I am having the same problem.

[jarvisuser90]

I'm also running into this problem. Any resolution?