Salesforce developer account error "We can't log you in because of an issue with single sign-on. Contact your Salesforce admin for help."

Senario we have created developer account on salesforce and integrated with Okta, once i try to login with new user which is also on the Salesforce side i am getting below error We can't log you in because of an issue with single sign-on. Contact your Salesforce admin for help. Solutions: 1. make sure the user you have create on salesforce side has right role. If role type is Org Proxy User, it will not work. Change the type to any other type like Identity, salesforce or others 2. make Sure SAML is enabled at SalesForce side 3. replace metadata on Salesforce side with Okta metadata -- it will remove any spaces