If you are unable to Start a New Project the below issues could be related:

1. Your company assignment has not been assigned by site administrators and your contract rights are not associated with your account. 

2. Your company's contract is not valid (Contract has not begun or ended)

You can reach out to Mediabox Support to troubleshoot the cause of the issue, but your Licensor contact should also be included as they will be the ones to resolve the problem.