I am getting error when try send sms

[Sunat2001]

socket_close(): Argument #1 ($socket) must be of type Socket, null given
path:/vendor/php-smpp/php-smpp/sockettransport.class.php

[franzose]

I can hardly help you here, sorry. I haven't worked with SMPP since I published this library. Please check your configuration.

[isadma]

@Sunat2001 could you able to solve the issue?