After taking a full Nandroid backup of my previous os and apps using CWM recovery, clearing cache and performing a factory wipe, I went ahead and flashed Lollipop. This is the ROM I used: https://s.basketbuild.com/filedl/devs?dev=F4k&dl=F4k/cm12/serranoltexx/cm-12-20150111-UNOFFICIAL-serranoltexx.zip
Upon first boot of Lollipop, I wasn't presented with any 'transfer existing apps/data' screen, but rather was just sent to the launcher screen. While lollipop runs fine however, I can't seem to be able to restore app data through either the custom recovery (just says "please wait" forever and phone gets stuck in a boot loop afterwards) or using apps on the actual phone. It is rooted (through both going into settings -> developer -> enable root access & also a flashable zip that I used) and both Titanium Backup(hangs at 0% and 1%) as well as Nandroid Manager(says 'error' when attempting to restore apps) both fail to restore.
Nandroid manager gave this output at the end:
/system/bin/pm: app_process: Permission denied
Is there any other way I can restore the app data?