HA will throw a lot of warnings in every start because many integrations are not supported by the HA team.
Error will most likely be there too,because some integrations and some user defined values are not set up for the states under a start before the actual sensor values have been gathered. These values can be unknown, unavailable, weird extreme values or assumed.
ah ok ya i get sometimes warnings or errors cuz my internet isnt good enough so enviromental canada the connection goes down and i get errors… or i get some force pull update for Shelly devices saying i need to use colorIT whatever that is… but its set but i get those errors not sure what tehy for and my Tplink i get errors like lost connection… for the most part it works… i do find sometimes shutting off a light by a switch and node red is to turn off shelly lights are slow at times like 1 min delay other times its fast… not sure what s up with all that … but i do apreciate this program … back 20 yrs ago you had to pay 1000+ to have home automation