The latest update to s2Member caused the same issue that the previous update did. I use Stripe for payments and when you click the “Add Billing Method” link it brings up the Stripe virtual credit card box. The Stripe logo is missing from the top. I found that s2Member is looking for it here:
/wp-content/plugins/s2member-pro/images/stripe-square.png
The images folder does not exist here. I need to make a new images folder in the s2member-pro folder and copy the png file into it in order for it to be found. The actual location of the stripe-square.png file as coded into the plugin is:
/wp-content/plugins/s2member-pro/src/images/stripe-square.png
The src folder is missing from the string. Please fix this in the next update.