Any time - @prak142 you may need to set it to the right API version in your stripe account.
Check with Stripe support for how that works there should be a version indication in the API menus somewhere.
I think I use the version with 2020 or 2021 in it, after upgrading from the one from 2016. I believe the latest gateway plugins use a version with 2023 in it (or will soon) which is not compatible.
For anyone using an older version of WooCommerce Stripe Gateway plugin, a vulnerability was fixed in 7.4.1. The best option is to apply the patch manually at this time: