Error 7

I wiped everything and tried to flash LOS 14.1, but it gave me Updater process ended with ERROR: 7. Before that, it gave me "E:unknown command [log]". I have a LG Optimus L90 D410.

Also, I couldn`t use the built-in updater when I had CM13, cuz I always had to delete the asserts line and delete double spaces in 2 lines in updater-script. How can that be fixed?

Here's the log: https://pastebin.com/0KWm6EkQ