Just to let you know how I solved this.
Following the other thread I was able to inspect the build tool output.
I do not use maven but gradle. Anyway I found that the wrapper wasn't able to bootstrap.
I checked and actually the gradle wrapper jar was missing! So I think the subversion checkout failed but the condition was not handled.
I created another project to get a fresh copy from svn and this second time the working copy has the gradle wrapper jar (as I hoped)
cheers and thank you for your great product!