Hey I have the same problem! I cant open my internal sdcard, so I cant open camera ( Please mount your sdcard). In settings I dont see sdcard at all and when i try to mount i got "Your sdcard is unmounted". In recovery mode I see my sdcard0 with all files, so i dont understand what is going on...
I have installed TWR,
wipe cache, data and Dalvik
flash cm11 and gapps
Have i missed something?
I read something about wipe sdcard before flashing cm11, but how it can be possible if I have cm11.zip there?