Plugin Error

Hello,

I tried using the plugin and received the following error message:

Warning: simplexml_load_string() [function.simplexml-load-string]: Entity:
> line 1: parser error : Space required after the Public Identifier in
> /home/content/71/10186971/html/alaskabiketouring/wp-content/plugins/wpzon/
> wpzon.php on line 78

Any suggestions on how I can fix it?

Thanks!

https://www.ads-software.com/plugins/wpzon/