Thanks, that got me a lot further! My old config was pointing to the wrong repo.
I got stuck on this issue as well: [Solved] Snapshot #930 not starting properly
But after some troubleshooting I found the item definition that triggered it, and removed it for now
Number Energy_Instant_House “Strøm effektbruk [%.4f kW]” (Power) { http=“<[http://www.energyhive.com/mobile_proxy/getCurrentValuesSummary?token=mytoken:60000:JS(efergy.js)]”}
clearing out cache and tmp again after disabling that JS item seems to have gotten me to the point of a working paperUI and no more log spam, so I think this is the final home stretch 