All of the CR1-SNAPSHOT and now CR2-SNAPSHOT builds are fine, its just the CR1 tag for some reason.
Its possible a misconfiguration of the job or something to do with the version somehow. I get the same issue if I:
cd into the CI nodes checkout
cd into blacktie/dist/target/blacktie-5.0.0.CR1
server -i 1 -s fooapp
As I say, CR2-SNAPSHOT is working fine so I suspect a misconfiguration