After setting the Application Identity Provider in the SAP Cloud Platform, the error 400 occurs when accessing applications such as SAP Web IDE.
In the application logs the following error is shown:
"Reason: No RelayState cookie found in the request. SAML 2.0 authentication failed"
SAP Cloud Platform Neo Environment
No RelayState cookie found in the request, Neo 400 , KBA , BC-NEO-SEC-IAM , Authentication, Authorization(Cloud Platform Neo) , Problem
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