This the error message:

    ==> default: ================================================================================
    ==> default: Error executing action `enable` on resource 'sensu_service[sensu-client]'
    ==> default: ================================================================================
    ==> default:
    ==> default: Chef::Exceptions::ResourceNotFound
    ==> default: ----------------------------------
    ==> default: Cannot find a resource matching ruby_block[sensu_service_trigger] (did you define it first?)
    ==> default:
    ==> default: Cookbook Trace:
    ==> default: ---------------
    ==> default: /tmp/vagrant-chef/c66d06dac7e6e1e4d559122d4d1a9f5c/cookbooks/sensu/providers/service.rb:52:in `block in load_current_resource'

It is because I did not include the sensu::default cookbook.