Issue due to a particular plugin that causes a Token validation issue on the SSO

Hello,

We have a few clients who are facing issues when they log in to the WordPress dashboard via SSO( Single sign-on) integrated via our Business app.

Error: LoginHandler: ERROR: Invalid JWT token. Error: “kid” empty, unable to lookup correct key LoginHandler: ERROR: invalid JWT salt LoginHandler: ERROR: (403) authorization failure

The Plugin identified here was Events Calendar ( After the new update 2 days ago).
Last time it was Google Listings and ads.

What seems to be wrong here?

Our developer’s thoughts:
SSO advanced login is meant to handle the login automatically by validating and managing the process and allowing you to login in one click.
If you have another plugin that needs to use/change that process, you need to deactivate SSO advanced login. What happens after that is up to the customer. Worst case you need to use a manual login like the above.

Logging via Manually using a username and password does work if the plugin is active. But not via SSO setup.

To clarify, I am not asking for any help with respect to SSO.

After the recent update for Events Calender 6.02, The plugin causes the SSO auth token to be invalidated.

Question: Is this plugin trying to manipulate any security defined by any SSO? It was working fine previously after the update issue occurred.

Hope This clarifies.