OpenSSL+Error while activating license of a WordPress plugin

Hi All
Need a help !
I am using Cyberpanel with Contabo cloud,
I am facing issues while activating license of a WordPress plugin.
When I enter the license number and click on activate it goes to a 403 forbidden page.

And here is the url error : /wp-admin/admin.php?page=bricksextras_menu&tab=license&sl_activation=false&message=stream_socket_client%28%29%3A+SSL+operation+failed+with+code+1.+OpenSSL+Error+messages%3Aerror%3A0A000410%3ASSL+routines%3A%3Asslv3+alert+handshake+failurestream_socket_client%28%29%3A+Failed+to+enable+cryptostream_socket_client%28%29%3A+unable+to+connect+to+ssl%3A%2F%2Fbricksextras.com%3A443+%28Unknown+error%29

Can anyone help me how to fix this issue please

Anyone notice this???