Hello All, I am unable to send out invoices with the billing module. Mail log does not show any activity but the nginx error log does but I don't know how to solve this. Can anyone help me with this ? Thanks in advance, Edwin 2019/11/09 13:12:29 [error] 29500#29500: *693789 FastCGI sent in stderr: "PHP message: PHP Warning: Use of undefined constant invoice_message_template_id - assumed 'invoice_message_template_id' (this will throw an Error in a future version of PHP) in /usr/local/ispconfig/interface/web/billing/invoice_action.php on line 53PHP message: PHP Warning: Use of undefined constant invoice_message_template_id - assumed 'invoice_message_template_id' (this will throw an Error in a future version of PHP) in /usr/local/ispconfig/interface/web/billing/invoice_action.php on line 53" while reading response header from upstream, client:<ip>, server: _, request: "GET /billing/invoice_action.php?id=7&list=invoice_draft HTTP/1.1", upstream: "fastcgi://unix:/var/lib/php7.3-fpm/ispconfig.sock:", host: "<hostname>:8080", referrer: "https://<hostname>:8080/index.php" 2019/11/09 13:12:35 [error] 29500#29500: *693789 FastCGI sent in stderr: "PHP message: PHP Warning: fsockopen() expects parameter 2 to be int, string given in /usr/local/ispconfig/interface/lib/classes/ispcmail.inc.php on line 588PHP message: PHP Warning: fgets() expects parameter 1 to be resource, bool given in /usr/local/ispconfig/interface/lib/classes/ispcmail.inc.php on line 589" while reading response header from upstream, client: <ip>, server: _, request: "POST /billing/invoice_message_edit.php?action=send HTTP/1.1", upstream: "fastcgi://unix:/var/lib/php7.3-fpm/ispconfig.sock:", host: "<hostname>:8080", referrer: "https://<hostname>:8080/index.php"
