# Auth0 SAML authentication request not working

**URL:** <https://community.auth0.com/t/auth0-saml-authentication-request-not-working/7035>\
**Category:** Get Help\
**Tags:** authentication, saml\
**Created:** [June 13, 2017, 1:00pm UTC](https://community.auth0.com/t/auth0-saml-authentication-request-not-working/7035 "2017-06-13T13:00:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![avisheknag17](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7c/User_font_awesome.svg/768px-User_font_awesome.svg.png) [@avisheknag17](https://community.auth0.com/u/avisheknag17)\
**Post date:** [June 13, 2017, 1:00pm UTC](https://community.auth0.com/t/auth0-saml-authentication-request-not-working/7035/1 "2017-06-13T13:00:29Z")

</div>

I am sending a saml authentication request to a registered IDP in Auth0 (username/password based). It is returning an error . Entire error response is given below:

“date”: “2017-06-09T13:46:57.631Z”,  
“type”: “f”,  
“description”: “invalid stored block lengths”,  
“connection\_id”: “”,  
“client\_id”: “jLOzIIRKS46RtJmIXnZFL9lHWnWGYuIT”,  
“client\_name”: “cac-idp”,  
“ip”: “122.181.187.98”,  
“user\_agent”: “Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36”,  
“details”: {  
“body”: {},  
“qs”: {  
“SAMLRequest”: "\<samlp:AuthnRequest xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" ID="CAC\_LOGIN\_310ada98-a0bd-41b2-a0e3-6fa7c8bd46aa" IssueInstant="2017-06-09T19:07:13Z" Version="2.0" ProtocolBinding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect" AssertionConsumerServiceURL="[http://avishek-local.cac.ekaplus:8080/apps/platform\“\>\<saml:Issuer\>http://avishek-local.cac.ekaplus:8080/apps/platform\</saml:Issuer\>\</samlp:AuthnRequest\>”](http://avishek-local.cac.ekaplus:8080/apps/platform%5C%22%3E%3Csaml:Issuer%3Ehttp://avishek-local.cac.ekaplus:8080/apps/platform%3C/saml:Issuer%3E%3C/samlp:AuthnRequest%3E%22)  
},  
“error”: {  
“message”: “invalid stored block lengths”,  
“oauthError”: “invalid\_request”,  
“type”: “request-error”  
}  
},  
“log\_id”: “49573801565560042589842960640377845263813493559635476514”  
}

---

<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/auth0/original/3X/b/5/b560f266932fcce5d57f09a6595bd50518cae3f3.jpeg) [@system](https://community.auth0.com/u/system)\
**Post date:** [March 2, 2018, 5:54am UTC](https://community.auth0.com/t/auth0-saml-authentication-request-not-working/7035/2 "2018-03-02T05:54:35Z")

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