Okay possible solution and this is likely a niche problem.
1. If you have installed MSEdgeRedirect Launchbox gets super confused
2. It will not open the site to download the specific .NET core runtime that really gets it jimmies going.
3. The weird thing is LB worked without this. Its just not great to have a dozen popups everytime i open it getting in the way
This can be possibly bypassed by just getting the below version or having a more robust error message that tells you exactly what its wanting (version and everything) and not spamming 20 popups, but it might not be fully LBs issue. MSEdgeRedirect might try and get everything to use anything other than Edge and LB is included and says NO to that for its welcome page?
Paultimate's post in Reinstalled Windows and all Launchbox requiremets yet still get this spamming me was marked as the answer