I have a similar problem,mine is installed on eMMC,and I have checked the mutiboot item files,yet it shows "root file system mmcblk1p2 Not available"
"guru mediatation #0000025.62017712"
Shouldnt this error only appear when the Nitdroid is installed on the memory card?
Mine is installed on the eMMC and I even tried reinstalling everything including the multiboot,Nitdroid kernel,etc