If you received the error message "Okta error: User is not assigned to the client application" at login, this means that your company's IT team has not added you to your company's Okta instance.
To resolve this, you'll just need to ask your company's IT team to add you to Okta. If your IT team has any questions or is unable to resolve the issue, they can reach out to us directly and we'll be happy to help.