Pay with stripe button doesn't do anything

Pay with stripe button doesn't do anything

I have my Zoho account linked with Stripe, but when I create a PDF invoice, at the bottom it says "Pay with credit card using Stripe" and there's an image of a little payment button, but in the PDF that button is just a picture, and clicking it doesn't do anything. I had this working at one point because I had a client pay via stripe, but now it's not doing anything. I tried switching invoice templates and double checked the integration between zoho and stripe, and I can't get it working. Anyone have any ideas?