It looks like the problem has to do with the project’s name being too long. Ironically that very problem prevents you from renaming the cloned copy of the project, because it requires creating a new project with a long name before renaming it…
I’ll fix this and update the farm soon, but in the meantime you can try renaming the original project with a shorter name, just make sure that you use fewer than 45 characters (the overall limit is 50 characters, and cloned projects automatically add “_copy” at the end, which uses 5 characters)
Jeremy