If a new BPMN process containing one service task is created from scratch in VSCode, building the project (mvn clean compile) produces error message:

Parser message: (null: 1, 451): cvc-elt.1.a: Cannot find the declaration of element 'bpmn2:definitions'.

See emp-onboarding-f964fb8.zip project.

The same issue applies also to other tasks (Script task).

The issue has been found by dmarrazz@redhat.com and rhn-support-agiertli.