Is there an option in Revit to automatically ignore unresolved references and continue opening the file without showing the dialog box?
Here's a half-a-solution that works for me.
When you get an error or some other kind of message
at the bottom right of your screen, move it up near the
top of your screen. That way it will at least pop-up in a
more pleasant location with its buttons close to where
you are working.
can you supply more information regarding the unresolved references ?
If these are related to link files, you can resolve them after opening the model and this message shouln't pop up next time you open the revit model.
There must be a setting because my 2016 AutoCAD opens dwgs with missing Xrefs and no dialog or warning box popups at all. I'm trying to find a way to turn it back on!