Trying to get property of non-object

[ricwein]

If im trying to run this library, i'm just getting back the following error:

Strict Standards: Creating default object from empty value in /var/www/exchange/lib/ExchangeClient.php on line 332
Strict Standards: Creating default object from empty value in /var/www/exchange/lib/ExchangeClient.php on line 333
Strict Standards: Creating default object from empty value in /var/www/exchange/lib/ExchangeClient.php on line 338
Strict Standards: Creating default object from empty value in /var/www/exchange/lib/ExchangeClient.php on line 340
Strict Standards: Creating default object from empty value in /var/www/exchange/lib/ExchangeClient.php on line 342
Notice: Trying to get property of non-object in /var/www/exchange/lib/ExchangeClient.php on line 354
Notice: Trying to get property of non-object in /var/www/exchange/lib/ExchangeClient.php on line 354
Notice: Trying to get property of non-object in /var/www/exchange/lib/ExchangeClient.php on line 354
Notice: Trying to get property of non-object in /var/www/exchange/lib/ExchangeClient.php on line 357
Notice: Trying to get property of non-object in /var/www/exchange/lib/ExchangeClient.php on line 357
Notice: Trying to get property of non-object in /var/www/exchange/lib/ExchangeClient.php on line 357

So clearly somthing is wrong with the variable $CreateItem, but i'm not able to figure out what...
phpStorm shows me the useless error 'Undifined Variable "CreateItem"... '

Any Idea why this error occurred?
Is it possible, that this error has something todo with the, may not right configured, curl at the server?