Getting error in console and payment popup with card options is not showing up

I am trying to integrate Paystack payment gateway with my custom form and suddenly i am getting below errors:

popup:1 Refused to apply style from ‘https://checkout.paystack.com/static/css/app.ae95f4402c6c43208071.css’ because its MIME type (‘text/html’) is not a supported stylesheet MIME type, and strict MIME checking is enabled.
popup:1 Refused to execute script from ‘https://checkout.paystack.com/static/js/app.f4f3340418415473b1b9.js’ because its MIME type (‘text/html’) is not executable, and strict MIME type checking is enabled.
It was working fine before and suddenly its not showing the payment proccess form.

Can you please help me with this issue as its very urgent for me because the site is live.

Thanks