I hope all is well.
The plugin seems to be working well at the moment, but I am receiving 1 error when sending an invoice to a client.
Notice: Undefined variable: success in /home/wp-content/plugins/web-invoice/Functions.php on line 2124
And this error can repeat on a page multiple times too.
The email is being sent.
* Operating System : Linux (64 Bit)
* Server : Apache
* PHP Version : 5.2.14
* PHP Max Script Execute Time : 30s