This is my chargebee url : https://supportingprojects.chargebee.com
I have created 3 plans in my account,but while i am trying subscription checkout, i am getting this message "Problem while processing your payment method,please vaify your payment method details."
This error usually occurs if you don't have a business account for which you would need to contact PayPal. Here's more on this error.
Do let us know if you need any further help.