yes i have same issue here. i am trying to make a site that only seen by members. for that i am using the wordpress login panel as login page. and i imported my member list from excel to user table in wp. for that members has no role.
when a member try to login site like https://www.site.com he is seeing the wp login panel. but after making the correct login he is not directing to main page but wp directing him to admin panel. i want him to direct to page which he wanna see at the begining.
