Assuming that you're referring to the admin UI, are you trying to access it with a user who belongs to the user role:
[Authorize(Roles = "CmsAdmins")]
Thanks @nate, Adding back the CmsAdmins virtual role in my config file resolved the issue
@Nate, thanks for your help, the issue has been resolved
Please could you help me to resolve an issue in Possible RobotsTxtHandler.
I've installed this add-on in Episerver DXC vesion. Accessing this add-on in CMS is throwing error - 403 forbidden error. "You don't have permission to view this directory or this page"
The add-on works fine in my local development environment but this is an issue only in app service from Azure environments.
Any help is much appreciated.