Having issue with Unable to process card

[pmiteshr3]

Hello,

I appreciate if someone can help me, I had latest code installed in Magento 2. It was working fine until yesterday all of a sudden I am unable to process the card.
The behavior is below:

1. Enter credit card details in UI.
2. Click Process/Submit.
3. The webpage comes back again asking Credit card again.

During above issue I noticed that, all of a sudden the card detection (VISA, MASTERCard etc...) stopped working.
Any troubleshooting steps will be great.

Thanks,
Mitesh