Spotfire Server: Attempting to log into Spotfire suddenly starts failing for all users

Details:

If your users have been able to log in fine in the past, and suddenly one day they cannot, then the below checks may guide you to resolution.

1. Do logins fail with multiple of your Spotfire environments (DEV, Test, Production, etc.), and you know that logins succeeded in the recent past?
YES: Check the health of your company's authentication system such LDAPS server, OpenID provider, etc. Resolve this common denominator, and it is likely that Spotfire logins will again succeed.
NO: Move onto next step. You have determined that the login issue is specific to a single Spotfire environment.

2. Does the user get a login screen? Is there any Spotfire response?

YES: Move onto next step. You have determined that the Spotfire server is alive and the client can reach it.
NO: Have the user ping the server name from a command prompt window on their client. If a ping fails then there is likely to be a network issue or the Spotfire server is down. Try to remote into the server and inspect. Have your user try to ping the server's ip address from the client; if that succeeds then you likely need to resolve a DNS look up issue. If possible, establish whether a Spotfire client running locally on the server can log in.

3. Does login fail for all users?
YES: Restart the Spotfire and Node Manager services, then try again. If issue still exists then move onto next step. If the services fail to start then pursue that.
NO: You have determined that the issue is specific to a single or a portion of the user base. Pursue what is different about this set of users.

4. Was there a recent interruption with the Spotfire database, even though the Spotfire server's Services window displays the Spotfire and Node Manager services as 'Running'? (Or if Linux, use the systemctl command) The users might be reporting '404 File not found' messages on their screen in this scenario.
YES: Restart the Spotfire and Node Manager services. If this resolves the issue then note for future planned database outages, it is best to stop the services and then restart after the planned event.
NO: Move onto next step.

5. Next try checking the LDAP Service Account, using the below TIBCO article:
https://docs.tibco.com/pub/spotfire_server/10.3.0/doc/html/TIB_sfire_server_tsas_admin_help/GUID-9CE8130E-2989-41EC-890F-76AE22ECD61E.html

6. Consider either of the below two articles:

TIBCO Spotfire analysis file fails to open in TIBCO Spotfire Analyst client with error "The '...' data connector is not available". (zendesk.com)

Unable to login to TIBCO Spotfire Analyst with the error "The remote server returned an error: (401) Unauthorized" (zendesk.com)

If none of these checks result in successful login, then review all of the logs and consider creating a troubleshooting bundle for Revvity Signals' Spotfire Support Team to analyze, as stated in this excerpt of the Admin Guide: 

Troubleshooting Spotfire Server (tibco.com)