I have just started to get a warning message (reproduced in attachment) on launch.
I am using Latest Mac OS, latest RW and Feather theme. I doesn’t matter if I choose the HD, or Web folder, or image folder, or export folder, the warning message re appears instantly.
I think it is referring to your resources. If you click on the resources button on the top left of RW8 you may see various resources with question marks on them. What you have to do is close the RW project and work out where they all are and make a note. When you reopen the project file click on choose and if there is more than one location you will have to enter each of them. When RW has found all the missing links, it will give you a cheery little message to let you know.