hello, my website maryouli.com is using Let’s Encrypt SSL,
i got an error with a payement gateway server
live url : https://www.smt-sps.com.tn/paiement/
sandbox url for test :http://188.8.131.52/paiement/
they told me that in their server they receive this error message : The underlying connection was closed: An unexpected error occurred on a send.
the issue started when i have activated ssl in my website maryouli.com,
i need your help please for this issue