when I custom my identity provider on hana cloud saml2 sso, configure my trusted identity provider ,then I met a problem:

respond with a document containing an XHTML form:

<formid="samlResponse"data-refreshParent="true"

action="https://accounts.sap.com/saml2/sp/acs/ssocircle.com"method="post">

<inputtype="text"name="SAMLResponse"id="SAMLResponse"

Value="PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVV…"/>

<inputtype="text"name="RelayState"

value='#Scfc5e9e3-a1de-42cf-ad43-2fb5fbce23b9-WwC3wSnsxWUt_bP0Xnuu.QmG14aE44WpfPpW3zdmmEo '/>

<inputtype="submit"value="Continue"/>

</form>

The ssocircle.com is my trusted identity provider name, now I get the following error :

HTTP Status 403 - Relay state does not contain orginal URL cookie.

and anther error is :

HTTP Status 400 - Service Provider endpoint ACS could not redirect to original application URL because it could not convert RelayState received to original application URL.