On premise Sharepoint 2019 - can't log in to site from external
Hi all, I just stood up an on prem Sharepoint 2019 server and have everything up and running, I have the external site configured, but when I try to log in with my AD creds, it goes back to the login window. Doesn't allow the creds to pass through. I have tried it from Safari, Chrome, Edge, and none of them are working. I googled the issue and have went through several of the solutions to try, but none seem to be working. Right now I only have HTTP enabled, not HTTPS. But that shouldn't matter for being able to log in with AD creds.
I checked the User Permissions tab under Manage Web Applications, selected the main site and all options are enabled. Under General Settings, I selected "Yes" under "Accept user name and password from the API".
Has anyone else seen this issue before? Any help would be greatly appreciated! Thanks!