Error 500 when creating an account

[piramides97]

I have an error 500 when creating an account. what can i do?

Warning: Function proc_open() was disabled by the domain protection module. Disable domain protection for this domain in the Server Panel to use this function. in /var/www/html/waf/domain_protection/function_warning.php on line 25

Warning: Undefined array key 2 in /home/piramide/domains/dev.studiohifi.pl/public_html/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/StreamBuffer.php on line 292

Fatal error: Uncaught TypeError: stream_set_blocking(): Argument #1 ($stream) must be of type resource, null given in /home/piramide/domains/dev.studiohifi.pl/public_html/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/StreamBuffer.php:292 Stack trace: #0 /home/piramide/domains/dev.studiohifi.pl/public_html/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/StreamBuffer.php(292): stream_set_blocking(NULL, 0) #1 /home/piramide/domains/dev.studiohifi.pl/public_html/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/StreamBuffer.php(54): Swift_Transport_StreamBuffer->establishProcessConnection() #2 /home/piramide/domains/dev.studiohifi.pl/public_html/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(143): Swift_Transport_StreamBuffer->initialize(Array) #3 /home/piramide/domains/dev.studiohifi.pl/public_html/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/SendmailTransport.php(50): Swift_Transport_AbstractSmtpTransport->start() #4 /home/piramide/domains/dev.studiohifi.pl/public_html/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Mailer.php(65): Swift_Transport_SendmailTransport->start() #5 /home/piramide/domains/dev.studiohifi.pl/public_html/classes/Mail.php(636): Swift_Mailer->send(Object(Swift_Message)) #6 /home/piramide/domains/dev.studiohifi.pl/public_html/classes/form/CustomerPersister.php(275): MailCore::send(2, 'account', '[Studio Hi-Fi K...', Array, '[email protected]', 'test testowy') #7 /home/piramide/domains/dev.studiohifi.pl/public_html/classes/form/CustomerPersister.php(239): CustomerPersisterCore->sendConfirmationMail(Object(Customer)) #8 /home/piramide/domains/dev.studiohifi.pl/public_html/classes/form/CustomerPersister.php(69): CustomerPersisterCore->create(Object(Customer), 'Password') #9 /home/piramide/domains/dev.studiohifi.pl/public_html/classes/form/CustomerForm.php(266): CustomerPersisterCore->save(Object(Customer), 'Password', NULL, true) #10 /home/piramide/domains/dev.studiohifi.pl/public_html/controllers/front/RegistrationController.php(64): CustomerFormCore->submit() #11 /home/piramide/domains/dev.studiohifi.pl/public_html/classes/controller/Controller.php(319): RegistrationControllerCore->initContent() #12 /home/piramide/domains/dev.studiohifi.pl/public_html/classes/Dispatcher.php(510): ControllerCore->run() #13 /home/piramide/domains/dev.studiohifi.pl/public_html/index.php(28): DispatcherCore->dispatch() #14 {main} thrown in /home/piramide/domains/dev.studiohifi.pl/public_html/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/StreamBuffer.php on line 292

 

[Knowband Plugins]

It's a server issue. The server has disabled the proc_open function. 

Try contacting the server support OR following error instructions i.e.  

Warning: Function proc_open() was disabled by the domain protection module. Disable domain protection for this domain in the Server Panel to use this function. in /var/www/html/waf/domain_protection/function_warning.php on line 25

Edit the file i.e. /var/www/html/waf/domain_protection/function_warning.php & check the same.