Fixes SSO login rejection (#2566)

# Description

## Checklist

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have performed a self-review of my own code
- [ ] I have attached images of the change if it is UI based
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] If my code has heavily changed functionality I have updated
relevant docs on [Stirling-PDFs doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
- [x] My changes generate no new warnings
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

src/main/java/stirling/software/SPDF/controller/web/AccountWebController.java

@@ -163,6 +163,9 @@ public class AccountWebController {
                 case "invalid_destination":
                     erroroauth = "login.invalid_destination";
                     break;
+                case "relying_party_registration_not_found":
+                    erroroauth = "login.relyingPartyRegistrationNotFound";
+                    break;
                 // Valid InResponseTo was not available from the validation context, unable to
                 // evaluate
                 case "invalid_in_response_to":