Problem while deleting a platform: Invalid argument supplied for foreach()

I'm trying to delete a platform which has no site attached and here is the log message:

Invoking post_hosting_verify_task hooks.	
Undefined index: packages hosting_platform.drush.inc:53	
Invalid argument supplied for foreach() hosting_package.module:437	
Invalid argument supplied for foreach() hosting_package.module:437	
array_key_exists() expects parameter 2 to be array, null given hosting_package.instance.inc:60	
array_key_exists() expects parameter 2 to be array, null given hosting_package.instance.inc:60	
array_key_exists() expects parameter 2 to be array, null given hosting_package.instance.inc:60
array_key_exists() expects parameter 2 to be array, null given hosting_package.instance.inc:60	
array_key_exists() expects parameter 2 to be array, null given hosting_package.instance.inc:60	
array_key_exists() expects parameter 2 to be array, null given hosting_package.instance.inc:60	
array_key_exists() expects parameter 2 to be array, null given hosting_package.instance.inc:60	
array_key_exists() expects parameter 2 to be array, null given hosting_package.instance.inc:60	
array_key_exists() expects parameter 2 to be array, null given hosting_package.instance.inc:60	
array_key_exists() expects parameter 2 to be array, null given hosting_package.instance.inc:60	
Undefined index: profiles hosting_platform.drush.inc:78	
Invalid argument supplied for foreach() hosting_platform.drush.inc:78	
Undefined index: sites hosting_platform.drush.inc:87	
Invalid argument supplied for foreach() hosting_platform.drush.inc:87	
Returned from hook drush_hosting_post_hosting_task	
Command dispatch complete	
Updated task status to "Warning"

And my platform is not deleted...