I am able to configure the sandbox account and rendering the login UI successfully but when login with credentials, it attempt failure and showing below error message :
You are not allowed to access this app. To request access, contact an admin.
Please provide the suggestion that helpful to me for resolving the issue.
My name is Akash, from Okta and I will be handling this issue.
Please sign in as an Admin to the Admin Console and ensure that the Authentication Policy is configured in a way that the user is allowed to access the Okta dashboard.