Run Specs error: Couldn't load the Unicode tables for

Run Specs error: Couldn't load the Unicode tables for

I tried to run my specs but I got the following error:
No DRb server is running. Running in local process instead ...
1) FinancialAccountsQuery parcial_future_releases LIMIT_DATE_FILTER
transactions
Failure/Error: let(:financial_account) {
FactoryGirl.create(:financial_account_with_church) }
IOError:
Couldn't load the Unicode tables for UTF8Handler (dump format
error(0x6b)), ActiveSupport::Multibyte is unusable
# ./spec/queries/financial_accounts_query_spec.rb:4:in `block (2 levels)
in <top (required)>'
# ./spec/queries/financial_accounts_query_spec.rb:106:in
`create_transaction'
# ./spec/queries/financial_accounts_query_spec.rb:8:in `block (3 levels)
in <top (required)>'
I tried to drop all the databases with rake db:drop, then create them
again with rake db:create and rake db:migrate, but nothing seems to solve
it.
My database.yml
development:
adapter: "mysql2"
encoding: "utf8"
database: "ibc1"
username: "root"
password: ""
host: 127.0.0.1
test:
adapter: "mysql2"
encoding: "utf8"
database: "gi_test"
username: "root"
password: ""
host: 127.0.0.1
Anyone has any idea to solve this ? Thanks :)