Whilst what you have stated is correct Ervia, there's actually an easier method. Where Chris is trying to export the group ID and not the contents, he's specifying the group via the group scope in a status tile. If you add the groups into the list scope individually, this will give you the IDs for the groups themselves.
Example - Chris is doing this which exports the objects contained in the group:
When in fact, he should be doing this:
One slight caveat is that if this Visio has the old school (SCOM 2007) Visio export data attached, this will need to be removed first. I had a few old school Visio’s and Squared Up wasn’t able to use the svg with the 2007 object data attached. Once it was removed, everything worked okay