Migrating back to MySql solves the problem but of course it is not a solution because I want to use pgsql for my users.
PostrgreSQL log shows:
2015-11-13 14:54:37 MSK STATEMENT: select * from "cors_config" where enabled = 1
2015-11-13 14:54:38 MSK ERROR: operator does not exist: boolean = integer at character 43
2015-11-13 14:54:38 MSK HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.