So i am configuring the paypal payment option to be my to go payment method put when I put in all the right details its and press save it says error paypal cannot be enable and then on top of the page its say a different message " Your current version of cURL php5 module is 7.19.7, which can prevent services that require TLS v1.2 from working correctly. It is recommended to update your cURL php5 module to version 7.34.0 or higher."
You might be following wrong configuration mode. The best way is to call PayPal Customer Services, who will divert your call to the technical department and they will telephonically tell you the steps for correcting the error.
Looks like you have to upgrade your php curl library. There are different instructions to do this depending on your server OS and configuration. If you can specify the operation system and php version on your server, I will be able to give more concrete advice.