'http://www.sitecore.net/identity/claims/originalIssuer' claim is missing error in Sitecore 9.1

Question

When trying to login Sitecore 9.1 CMS server with Azure Ad fedAuth, I am not getting loggedin. When I checked the Sitecore logs it shows the below error,

ERROR [Sitecore Identity] Unable to get user info - Internal Server Error
ERROR [Sitecore Identity] 'http://www.sitecore.net/identity/claims/originalIssuer' claim is missing
ERROR Unable to create a user. Reason: DuplicateUserName

When I checked the identityserver in the meantime, i am getting the below error,

{
  \"ClientId\": \"Sitecore\",
  \"ClientName\": \"Sitecore\",
  \"RedirectUri\": \"https://<url>/identity/signin\",
  \"AllowedRedirectUris\": [
    \"{AllowedCorsOrigin}/identity/signin\",
    \"{AllowedCorsOrigin}/signin-oidc\"
  ],
  \"SubjectId\": \"ecY44O9pG4FUjQS7HqIgI8LWetZHHnrJn2u83KwtSsg\",
  \"ResponseType\": \"code id_token token\",
  \"ResponseMode\": \"form_post\",
  \"GrantType\": \"hybrid\",
  \"RequestedScopes\": \"openid sitecore.profile\",
  \"State\": \"OpenIdConnect.AuthenticationProperties=zYO-qtV_MLTRvsaL8md9EXlT0L0-ljoenKICj2aJYW2fXwvg4bms9-Fa9JlNx3cE4ghPKYlb1UU-rzYM71AbXZWsc5padKIO26hI7mvgBa3eFVJ2As_i9l977Uk9nt35SJ3CY26zFC9qd-Qn1ef5m1sVKf6ff0QTNOJSw4z3RGN6M1wgPgJhSuG6n0ueIOj-HYXOioN45qbErGCjHFdSEQ\",
  \"Nonce\": \"637279998148674012.ZjFkMzkwNGQtNjkwNC00Yzk2LWJhNzMtZGY1YzYwOTliNmIxMzk5Mzk0ZGYtODVjYi00ZDdkLWFmMjUtNGY1YzVhZmE5ODNk\",
  \"PromptMode\": \"login\",
  \"SessionId\": \"d60608bcfa4c4a863486ad98773c8a7d\",
  \"Raw\": {
    \"client_id\": \"Sitecore\",
    \"response_mode\": \"form_post\",
    \"response_type\": \"code id_token token\",
    \"scope\": \"openid sitecore.profile\",
    \"state\": \"OpenIdConnect.AuthenticationProperties=zYO-qtV_MLTRvsaL8md9EXlT0L0-ljoenKICj2aJYW2fXwvg4bms9-Fa9JlNx3cE4ghPKYlb1UU-rzYM71AbXZWsc5padKIO26hI7mvgBa3eFVJ2As_i9l977Uk9nt35SJ3CY26zFC9qd-Qn1ef5m1sVKf6ff0QTNOJSw4z3RGN6M1wgPgJhSuG6n0ueIOj-HYXOioN45qbErGCjHFdSEQ\",
    \"nonce\": \"637279998148674012.ZjFkMzkwNGQtNjkwNC00Yzk2LWJhNzMtZGY1YzYwOTliNmIxMzk5Mzk0ZGYtODVjYi00ZDdkLWFmMjUtNGY1YzVhZmE5ODNk\",
    \"redirect_uri\": \"https://<url>/identity/signin\",
    \"sc_account_prefix\": \"sitecore\\\",
    \"prompt\": \"login\",
    \"sc_message\": \"**You do not have access to the system. If you think this is wrong, please contact the system administrator**.\",
    \"x-client-SKU\": \"ID_NET451\",
    \"x-client-ver\": \"5.2.2.0\"
  }
}

Everything was working fine until we migrate the DB server. When we migrate the DB server, the error comes up. This issue happening only for specific peoples. Some of them able to login successfully.

Please let me know how to fix this

Answer 1

For my case, i just restarted the Identity server app service and everything started working fine.