Run has failed while undeploying the process

Dear all,

I am trying to do the 'Getting started tutorial' of BonitaSoft (https://www.youtube.com/watch?v=fxmVQ84k0EM).

I exactly followed the different steps of the tutorial but I am blocked when the process is run (at minute 33 aproximately).

The error message I get is the following : Run has failed while undeploying the process
When I click on details, I can see the following comment : Attempt to log in with user helen.kelly has failed! Please check that this user exists in the active organization and/or that the password is correct in your run configuration of Travel request (1.0).

I have never worked with BonitaSoft before so it is hard for me to find out what the issue is due to.

Can someone help me out on this?

Many thanks in advance!!!