When I installed EPiServer I left the default configuration for membership as MultiplexingMembershipProvider and role as MultiplexingRoleProvider.
After adding a new User and making them a member of a group which has access rights to everything from root, I am unable to login with the newly created user.. How do I give these users access to the CMS?
Thank you, Johan Kronberg for pointing me to the right direction. Here it is in case anyone is struggling to find out why it's not working.
In my web.config I had to add the group I created to be allowed authorization in the following line:
<allow roles="WebEditors, WebAdmins, Administrators"/>