Description of problem:
As summary.

Version-Release number of selected component (if applicable):
https://maitai-bpms.app.qa.eng.nay.redhat.com based on BPMS6.0.0

How reproducible:
100%

Steps to Reproduce:
1. Go to maitai-bpms site.
2. Clicking Authoring->Project Authoring->New Item->Business Process.
3. Draw new diagram in the new business process area.
4. Click Save button.

Actual Result:
Error is shown on the prompt window as attachment.

Expected Result:
Save related text should shown on the prompt window to replace Error.
User may think there is invalid input in the diagram.

Additional info: