Failed to get default contexts and file mode for storage files

I'm trying to flash a new ROM to my Asus Transformer Infinity (TF700T). I unlocked it and installed TWRP 2.8.3.0, but when I launch the recovery, the output screen immediately displays the following:

Updating partition details...
... done
Full SELinux support is present.
E:Failed to get default contexts and file mode for storage files.
MTP Enabled

The Failed line above appears in red on the screen, while nothing else does. I managed to get the CROMBI-KK ROM installed, but it took quite a few tries. If I configure it for F2FS file system (which I want to use), the F2FS conversion succeeds but the install fails outright. Other settings just cause an infinite loading screen after install.

Is there anything I can do to fix the storage device error?

Is it related to the failure of F2FS, or is there anything else I can do to install with F2FS?