I found solution, It was a problem with the assignments module. I was using backup from Moodle 2.2.
When you are using assignment module in the 2.7, there are two modules: Assignments 2.2 and Assignments.
You should turn on both of them. After that try to restore course and voila! Everything is know ok.
Some more information about differences between Assignments in Moodle 2.2 and Moodle 27:
https://docs.moodle.org/27/en/Upgrade_tool
Greetings!
P.S. I had problem with this module, you can have problem with another ;)