[Plugin: Events Registration with PayPal IPN] fatal error line 719

Hello

I just installed your plugin which I find great !

When I installed, I first had an alert message saying in French there were some strange characters in the php files, and should I meet problems using the plugin I should desinstall it.

I tried to use it anyway. So I went to organization setting page, and on the right side, there is written this :

Fatal error: Call to undefined method WP_Error::get_item_quantity() in C:\wamp\www\wordpress\wp-content\plugins\advanced-events-registration\event_regis.php on line 719

Well, I created one free event anyway (I don’t need anything else but free events), also adding questions of my own,following the whole procedure, and it works !

The only things troubling me are :

1 – I would feel better if there was no error but I am not a developper and definitly don’t know what to do.

2 – I never received the confirmation e-mail, And I would very much like this feature to work. Maybe this is because of the fatal error ? Or because I used french characters in the message (you know, letters with accents and that kind of things) ?

3 – Since the events published on my website are free, I would like the cost not to appear, as well as the state dropdown list not to appear at all. Is this possible ?

Thanks for your help. It is a great plugin !
If you have a simpler one without money-paying feature, I would love it !

Thanks anyway !

https://www.ads-software.com/extend/plugins/events-registration-with-paypal-ipn/