PayPal missing on checkout after upgrade to 2.1.8

Although the questions is asked more than a year ago it is pretty difficult to find a good answer for this issue. Let me help people save time in the future who look for an answer too.

It seems that since version 2.1.8 there has been introduced a bug which makes a working/configured Paypal payment option disappear (or not show up in the first place) from the checkout page. The solution is to set the enabled option to yes of the PayPal Billing Agreement section. This wil make sure Paypal will be visible (agian).