diagramTypeProvider must not be null
When following the openSAP "Introduction to SAP Hana Cloud Platform", Week 2, Unit 1, working on Eclipse on my machine (Windows), I am stuck at the step "open diagram" in the JPA Content (in the Project Explorer Menu) :
the error diagramTypeProvider must not be null shows up.
I have already checked that the JPA diagram editor is well installed.
-> Do you have any advice to solve this issue ?
Thanks in advance,