mod errors

Its always in the error message.

You need to maybe look at everything

From beginning to end

First

Working app

Second

Mod/tweak

Third

Broken app

Its something you changed incorrectly
Most probably
During zipping process.
Try a couple of pre-made roms
If you can successfully flash it after your process
Unzip then zip
Then apply that method in your experiment.

I could also point out

Deodex

While you were going through the steps it could have corrupted it