This issue is a clone of
RHDM-1371 as we support both environments (business central and kogito), however we deliver the fix separately.
Test scenario tool isn't able to execute models using imported inputs and/or decisions nodes,
I am getting this error when executing "usingCheckCustomerInput-testing" found in this reproducer project 
ERROR [org.kie.dmn.core.impl.DMNRuntimeImpl] (default task-3) Required dependency 'cc.Customer' not found on node 'Communication Channel'
Same behavior when running "usingCheckCustomerDecision1-testing"
and, I am getting the attached warning when opening the test scenario tool