Harry was here...

Yes the login with https://samlsp.labb.sunet.se/ OpenID Provider works ! Choosing a different provider https://oauth2-server.demo.dev.oidf.lab.surfconext.nl gives error that we need to uderstand: Could not resolve the selected provider: Could not resolve trust chain for https://oauth2-server.demo.dev.oidf.lab.surfconext.nl via any trust anchor: https://realta.labb.sunet.se: 400 Client Error: Bad Request for url: https://realta.labb.sunet.se/resolve?sub=https%3A%2F%2Foauth2-server.demo.dev.oidf.lab.surfconext.nl&trust_anchor=https%3A%2F%2Frealta.labb.sunet.se; https://ta.tiime2026.aai.garr.it: 404 Client Error: Not Found for url: https://ta.tiime2026.aai.garr.it/resolve?sub=https%3A%2F%2Foauth2-server.demo.dev.oidf.lab.surfconext.nl&trust_anchor=https%3A%2F%2Fta.tiime2026.aai.garr.it