I don't think this is a bug. You just need to switch the preview browser to something else, or install the browser the error mentioned. The error message also mentions "Alternatively, change the 'Preview browser' setting in project properties to another browser", so it told you the answer... maybe you have error-message blindness, like a lot of people who just click away errors without reading them?
I don't think continuing to launch the default browser will help either, because the error message will still keep appearing every time you preview, which will quickly get annoying, so you'd still want to fix it first.