[Q] [Nexus 4] PA 5.0 - No filesystem access after flashing topic

Hi,

i just flashed my nexus 4 to the new version of paranoid android (5.0). To do so I followed the following steps:
- factory reset
- flashing the rom
- flashing pa gapps for 5.0
- restarting the phone

and at this point, my phone has no access to my file system. i cant even make screenshots because "not enough space". my pc says "internal storage" is empty. if i boot to recovery i can see all files / folders.
i think its a permission problem - but if i do "fix permissions" i'm stuck in the boot animation, and i've read i shouldn't do it on android 5.

fortunately i've made backups :D
i hope someone can help me with this problem.