SCIM Server okta

if i test connector in okta i am getting Connector configured successfully but while importing users from Onprem SCIM Server to okta i am getting below exception can u plzsuggest me on this issue.

An error occurred during import
Error while downloading all users: Exception in deserializing the Group Json String. Error message=Resource ‘Group’ is malformed: ‘urn:scim:schemas:core:1.0’ must be declared in the schemas attribute., json string={“meta”:{“meta”:"/scim/v2/Users/",“resourceType”:“User”},“schemas”:[“urn:ietf:params:scim:schemas:core:2.0:User”],“name”:{“firstName”:null,“lastName”:null,“email”:null},“active”:true,“id”:“006b2106-b0fc-4f96-95b9-9f6063a3a45b”,“userName”:“”}, uri=null