Merge pull request #9368 from mendix/kv-troubleshooting-byoidp

BYOIDP-Trobleshooting

Author: Karuna-Mendix

content/en/docs/control-center/security/set-up-sso-byoidp.md

@@ -295,3 +295,7 @@ Versions of Studio Pro below 9.18 use an embedded browser for login. This may no
 ### IdP Does Not Have JWKS Endpoint
 
 If the IdP's well-known endpoint does not have a URL for the JWKS endpoint, Mendix cannot validate the signature on the received ID-token, and the delegated authentication fails.
+
+### Mendix Platform Does Not Accept the IdP Client Secrets
+
+If client authentication at your IdP/token endpoint fails, check the client secret used in your Identity Provider (IdP) configuration. The issue may be caused by special characters in the client secret. Try using a client secret that contains only alphanumeric characters.