How to troubleshoot the error "The SPA default page middleware could not return the default page" obtained while trying to leverage SAML-Orchestrator integration?
Issue description:
While integrating UiPath Orchestrator with SAML to leverage single sign-on via SAML, sometimes the following error may be encountered upon attempting login:
"An error occurred while loading the external identity provider. Please check the external identity provider configuration. (#217)"
A null pointer exception may be observed in the Event Viewer logs on the Orchestrator Server and the following is seen in the browser:
StatusCode":500,"StatusDescription":"InternalServerError","Message":"The SPA default page middleware could not return the default page '/index.html' because it was not found, and no other middleware handled the request.\nYour application is running in Production mode, so make sure it has been published, or that you have built your SPA manually. Alternatively you may wish to switch to the Development environment.\n
This error generally occurs if there is a null value in the SAML settings which has a non-null constraint in the database.
Resolution:
- Ensure that you've followed all the steps for the Orchestrator-SAML integration as elaborated in the UiPath official document as per your respective service provider: Configuring SSO with SAML.
- Check the service certificate location and ensure that it is not empty and has an appropriate value.
- If you have additional SAML settings configured, make sure they are not empty and have the right value. Remove anything that is not required. Be mindful that the saml2.xml file takes precedence over the settings page. (Check out this helpful article! )