Hi,
Do you have a copy of that project that works? If you do, there is no reason why you could not copy that to another computer, this seems weird.
are you sure that you launch with the same Unity version? maybe you have a slightly different version and it corrupts it.
- in the original project, are you using the latest playmaker? if not, make sure to update and then copy and try to open that copy on the other computer.
Bye,
Jean