IdP-Initiated login is not enabled for connection - SSO Setup

We have setup a SAML access point for SSO, we get as far as trying to log into docker but get this error back

Invalid_request

IdP-Initiated login is not enabled for connection “samlp-546916ff-6a64-4242-9335-c1486e800936”.

Tracking ID: 2af3d0408b7ef1ad80a8

The helpdesk is well not working, any help would be good please?

Thanks