Hello! I think you need to provide a little more information that that: when do they get the error? What do they do exactly? Does this happen on a single system or can they reproduce systematically? Can you reproduce it?
I am seeing this error as well. It shows up in the console log. The message is repeated maybe a dozen times. It doesn't seem to affect the install, but it is disconcerting.
You can also see the error in stderr if you run the install prog directly (using terminal):
