I ran a basic unit test for ruby but I am getting this error.

Can anybody help me what to do?
- Unable to create iteration: Executable Object Provider not found for jruby. Reason com.pushtotest.tm.eop.JrubyExecutableObjectProvide r

Node localhost with URL http://localhost:8080/TMServer/ws/TestNode is invalid.
Reason: Error while running setup of Test Case.
Errors found while executing the scenario: No a single working node
Releasing nodes
Execution completed in 0 minutes
Test completed