InstagramException class not loaded

[Former user]

If a exception in the Instagram library occurs an InstagramException is thrown. But this class is not loaded. It's simply missing in the InstagramAdapter class in the beginning where the library from the Phar is loaded. All other libraries bring their own autoloading. For the instagram library both classes have to be included manually. So just insert

@include 'phar://' . $extensionPath . 'instagram.phar/src/InstagramException.php';

before the line

@include 'phar://' . $extensionPath . 'instagram.phar/src/Instagram.php';