Error importing from vanilla: invalid byte sequence in UTF-8

Product Support Migration
23

Okay, This worked. But now I’m getting this error:

script/import_scripts/vanilla.rb:98:in `import_users': undefined method `[]' for nil:NilClass (NoMethodError)

admin_role_id = @roles.select { |r| r[:name] == "Administrator" }.first[:role_id]
                                                                       ^^^^^^^^^^

First user is Admin in database