AJAX Quick Checkout FREE error

I have been trying to install AJAX Quick Checkout FREE but i get this:
Uncaught exception 'Exception' with message 'String could not be parsed as XML' in /home/NAME/public_html/nofire/admin/controller/module/d_quickcheckout.php:657 Stack trace: #0 /home/NAME/public_html/nofire/admin/controller/module/d_quickcheckout.php(657): SimpleXMLElement->__construct('') #1 /home/NAME/public_html/nofire/admin/controller/module/d_quickcheckout.php(65): ControllerModuleDQuickcheckout->get_version() #2 [internal function]: ControllerModuleDQuickcheckout->index(Array) #3 /home/NAME/public_html/nofire/vqmod/vqcache/vq2-system_modification_system_engine_action.php(65): call_user_func(Array, Array) #4 /home/NAME/public_html/nofire/system/engine/front.php(34): Action->execute(Object(Registry)) #5 /home/NAME/public_html/nofire/system/engine/front.php(29): Front->execute(Object(Action)) #6 /home/NAME/public_html/nofire/admin/index.php(175): Front->dispatch(Object(Action), Object(Action)) #7 {main} thrown in /home/NAME/public_html/nofire/admin/controller/module/d_quickcheckout.php on line 657

The install instructions are like this: upload the files via FTP
Install in admin
Done

When i try to install this thats when i get the error.

Please help me!

contact the developer for such issues.