Switch to universal login

I’m trying to switch an asp.net mvc (owin) app to use universal login. I’m following this quickstart https://auth0.com/docs/quickstart/webapp/aspnet-owin/01-login

I followed the steps, and it appears to almost work. Auth0 sends the code back to my app, but I get an exception unpacking it. The error message I get is:
IDX10503: Signature validation failed. Keys tried: ‘Microsoft.IdentityModel.Tokens.X509SecurityKey , KeyId: *****
Microsoft.IdentityModel.Tokens.RsaSecurityKey , KeyId: ****’.

I think i’m missing a bit of configuration but I"m at a lose as to what it could be

:wave: @levi were you able to solve the error you were getting while converting to universal login in your asp.net app?