Update README.md
Add link to new troubeshooting tip.
@@ -19,4 +19,5 @@ To renew the certificate note the following things:
- redeploy all live containers (with jenkins job)
- check if everything works (HTTPS, websocket and JMS communication)
-
+# Troubleshooting
+Updating the certificates sometimes fails. If things have stopped working for you after a certificate renewal, this [troubleshooting tip](/documentation/troubleshooting.md#exception-in-owner-webapp-log-pkix-path-building-failed) may help.
