We are sorry about this issue. Please make sure you did not change images path.
Can you please share your composition so that we can check at out end.
I unfortunately get this error too. 10.10
Good catch, Joel. This occurs only when Safari is the default browser. When I preview with Firefox as default, Edge Animate returns no error. This is true while running the latest versions of Yosemite and Safari (8).
This is a bug. But we are still working out if it has to be resolved with safari or Edge animate. Will keep you posted on the updates.