I wrote a document a while ago to install pglister, pgweb and pgarchives that might help you, although your setup is not exactly the same: https://gitlab.com/cmatte/pglister/-/blob/master/INSTALL.md I guess you're missing the part where you have to create a community auth site in pgweb's /admin/account/communityauthorg/add/ and /admin/account/communityauthsite/add/