Added a (potential) fix for Unable to retrieve marketplace add-ons: type must not be empty.
Change ignores add-ons with issues, giving:
2023-01-26 16:19:15.311 [WARN ] [ity.CommunityMarketplaceAddonService] - Ignoring marketplace add-on 'About the Add-on Marketplace category' due: type must not be empty
So I guess About the Add-on Marketplace category is the offending entry 
But IMHO it makes sense to skip those with error anyway and still display others …