[Q] Stuck on encrypted boot topic

I rooted by i9500.
I flashed CM ROM and encrypted my device.
I updated my CM ROM using recovery mode.
When I power on my device I am asked to enter my encryption password.
Then I am stuck at the Android logo (decrypting logo).

Using recovery mode
- I wiped /data
- I wiped cache
- I wiped Dalvik cache
- I set it to factory settings

All this didn't help.
I found 2 (for me not working) solutions:
mke2fs -t ext4 /dev/block/mmcblk0p12
and
mke2fs -t ext4 /dev/block/mmcblk0p15

No success.
Does anyone have a suggestion?

Thank you in advance!