When I try and sign in to Potlatch3 it gets over the first hurdle but fails at the second:
(the credentials were copied from a password manager and worked in an incognito web browser, which should rule out my typing as a factor)
Is this perhaps related to the Oauth1 / 1.0a / 2 changes - https://lists.openstreetmap.org/pipermail/announce/2024-February/000116.html ?