Fatal error: Uncaught Exception: Internal Server Error in /home/feham/public_html/sub/work.feham.ir/Gap/src/SDP/Api.php:572 Stack trace: #0 /home/feham/public_html/sub/work.feham.ir/Gap/src/SDP/Api.php(377): Gap\SDP\Api->sendRequest(NULL, Array, 'invoice') #1 /home/feham/public_html/sub/work.feham.ir/Gap/examples/invoice.php(6): Gap\SDP\Api->sendInvoice(86378399, 1000, 'My Invoice Desc...') #2 {main} thrown in /home/feham/public_html/sub/work.feham.ir/Gap/src/SDP/Api.php on line 572