Upgraded from 4.x to 5 beta 6 just to test around, as I don’t have anything on this server running production yet. Users are getting:
Invalid pattern 'apis\(.*)' at offset 9. Too many )'s.
I am not sure if I missed something I need to adjust. We are using ADFS with F5 Load Balancer between two PSU Servers.
Now I am getting a 500 error.
@adam Want me to put a github request in? I know there is no support for v5 being beta. 
2024-06-18 12:00:20.187 -04:00 [DBG] Connection 0HN4F2JG9QI5J established using the following protocol: "Tls12"
2024-06-18 12:00:20.200 -04:00 [DBG] Connection id "0HN4F2JG9QI5J" bad request data: "Invalid request line: 'GET /\x0D'"
Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException: Invalid request line: 'GET /\x0D'
at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpParser`1.ParseRequestLine(TRequestHandler handler, ReadOnlySpan`1 requestLine)
at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.Http1Connection.ParseRequest(SequenceReader`1& reader)
at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.Http1Connection.TryParseRequest(ReadResult result, Boolean& endConnection)
at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequests[TContext](IHttpApplication`1 application)
at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequestsAsync[TContext](IHttpApplication`1 application)
2024-06-18 12:00:20.200 -04:00 [DBG] Connection id "0HN4F2JG9QI5J" disconnecting.
2024-06-18 12:00:20.200 -04:00 [DBG] Connection id "0HN4F2JG9QI5J" stopped.
2024-06-18 12:00:20.200 -04:00 [DBG] Connection id "0HN4F2JG9QI5J" sending FIN because: "The Socket transport's send loop completed gracefully."
I was able to manually login by modifying the database and adding a role. Still cannot use SSO.