Thanks for posting your question about setting up a staging site. The version should not be an issue. I’ve tested it against the version you are running and it worked fine. Do you currently have a WordPress website? Typically, you have to have a WordPress site already live to deploy a staging site. When BoldGrid detects a site that is currently live, it will prompt you to install on staging. If you don’t have a site yet, keep in mind, once you are through the Inspirations phase you will have a fully functional BoldGrid site with content and images. That’s the upside to launching; you can go live quicker and take your time to change out the content as you see fit.
If you’re still having issues, can you provide us the domain you are using and we’ll be happy to investigate it further? I hope this helps!