Stripe popup is not working

I am using DigitalOcean for hosting my blog. Everything is working nicely but stripe popup for payment is not working.

This is showing the following issue when I click on the subscribe button.

Looking for the solution.


Would you be able to provide more information on the site itself? Such as Ghost version and whether Stripe has been fully configured?

Yes, stripe is fully configured.
I am using Ghost 3.13.4


It looks like your blog url is configured to be http - you can check this by running ghost config get url

to fix this, you need to update your bog URL (ghost config set url {url}) to https and restart ghost