Invalid argument supplied for foreach() in filerelationsserver.module

Hi all,

thanks for this attempt to put forward the fileframework via webdav. After enabling the filerelationsserver I received an error. I had done the following:

1. Installing fileframework + DAV + og
2. Creating content and test-driving installation
3. Enabling filerelationsserver
4. Accessing installation via webdav

While accessing a file node within an organic group I receive the error:

Invalid argument supplied for foreach() in /var/www/test/sites/all/modules/filerelationsserver/filerelationsserver.module in line 504.

Also I tried to edit a file via webdav and while trying to save or upload a locally saved version I received another error:

A resource cannot be created at the destination until one or more intermediate collections (folders) have been created.

Maybe somebody can help me with one of the two.

Best wishes

Sebastian