The issue at hand involves the configuration of the SAML inline hook in Okta. Despite a successful generation of requests and obtaining service responses when using Postman, the Okta console returns the error:

Error: "Could not deserialize inline hook response due to error at Line 1 Column 1"

Upon further investigation, it appears that the discrepancy lies within the format of the "data.assertion.subject" in the response provided. Instead of the expected format "subject": {, the response shows "subject": {. A space separates the "{" value from the "subject" value, which may be the root of the issue.

• SAML Inline Hook
• Scenarios when there is a discrepancy in the response format

The root cause of this issue seems to lie in the formatting of the "data.assertion.subject" line in the response. Specifically, the space separating the "{" value from the "subject" value leads to a mismatch with the expected format "subject": {. This discrepancy can cause the Okta console to fail to deserialize the inline hook response, resulting in the error message.

To resolve this issue, the following steps should be implemented:

1. Open the response provided.
2. Navigate to Line 1, Column 1.
3. Correct the formatting for "data.assertion.subject" to remove the space between subject and {.
4. The corrected format should appear as subject: {.
5. Save the changes to the response.
6. Retry the request in the Okta console.

Following these steps should eliminate the error message and enable the successful deserialization of the inline hook response in Okta.
 

Related References

• Okta Developer Page SAML Hook