After updating to RW 6.2.4 I cannot preview or save my site

After updating to RW 6.2.4 I cannot preview or save my site. I receive the following message:
Exception while exporting site ** +[NSString stringWithCString:encoding:]: NULL cString
Any help will be greatly appreciated
Savvas

Hi there

http://community.realmacsoftware.com/t/os-x-10-10-5-beta/611

Thanks,

—Nik

Absolutely right. Nothing to do with the RW update. OS X 10.10.5 is the culprit!
Thank you!