Error Authentification SAML

Hello,

I'm getting the follwing 2 errors in Integration Env:

Could you please help me to understand those errors and if you have any advise to fix them?

 Thanks in advance for your help

• First error

219 [ajp-nio-8009-exec-7] ERROR com.appiancorp.security.auth.saml.SamlFilter - An internal error occurred while trying to authenticate the user.

org.springframework.security.authentication.InternalAuthenticationServiceException: Error while trying to extract SAML Auth Token

        at com.appiancorp.security.auth.saml.SamlFilter.getSamlAuthenticationToken(SamlFilter.java:188)

        at com.appiancorp.security.auth.saml.SamlFilter.attemptAuthentication(SamlFilter.java:90)

• second error

898 [ajp-nio-8009-exec-4] ERROR com.appiancorp.security.auth.saml.SamlFilterPredicate - Error extracting SAML message: null

java.lang.NullPointerException

        at java.util.Objects.requireNonNull(Objects.java:203)

        at java.util.Optional.<init>(Optional.java:96)

        at java.util.Optional.of(Optional.java:108)