Hello, I also had the same problem - tired the solution suggested but it doesn’t work for me. I did:
$ chmod +x kolibri-v0.7.0.pex
$ ./kolibri-v0.7.0.pex start
at got such errors at the end of the process:
OSError: [Errno 13] Permission denied: ‘/Users/aniaskowron/.pex/install/kolibri-0.7.0-py2.py3-none-any.whl.cf9ae904b8e7982564468df72f83e26182bb3a19.6613d46ac49549ff904a98dd847e5cf6’
I would appreciate your help. Thank you!