SSO & SAML with idp AD FS Windows 2012

I have configured SSO & SAML with AD FS in Windows 2012 as a IDP, but when I try to log in I get the message:

“User account not provisioned”

I don’t get any error in event viewer, but in Nextcloud log I see:
“The status code of the Response was not Success, was Responder”

In transformation claim rules I have assigned SAM-Account-Name to “Windows account name”, could it be the problem?