The Force.com Migration Tool throws the error Entity type: 'Folder' is unknown
when attempting to deploy with the following build.xml file. As far as I know, one should be able to retrieve/deploy folders- "Folder" is listed as a type for the Metadata API in the Salesforce docs. I'm able to retrieve and deploy the other types in the file as expected. Why am I unable to deploy folders?
<?xml version="1.0" encoding="UTF-8"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
<types>
<members>AnApp</members>
<name>Folder</name>
</types>
<types>
<members>AnApp</members>
<name>CustomApplication</name>
</types>
<types>
<members>AnApp_Project__c</members>
<name>CustomObject</name>
</types>
<types>
<members>AnApp_Project__c</members>
<name>CustomTab</name>
</types>
<types>
<members>AnApp/AnApp_logo.png</members>
<name>Document</name>
</types>
<version>37.0</version>
</Package>