Generally these errors only indicate that you are using some tool that blocks trackers
This is unrelated, is an error of which @david is aware of and that will fix as soon as he has time to do it (it appears from the previous version of Discourse).
Each update may inadvertently break third-party plugins already installed. Do you have unofficial plugins installed? Try to uninstall them and do the rebuild only with the official ones.
Much more likely it could be that you have the same problem that happened here: