@AK_4_Life said in Invalid credentials:

On a new install, I am receiving error "Invalid credentials" when trying to login with my Agent login or as a customer that I created. I am sure of the password, and have reset it multiple times to be sure.

Let us know, you have using the correct URL's for the login account for customer and agent.

For admin/agent URL like this:

localhost/your-project-folder-name/public/en/member/login

For customer URL like this:

localhost/your-project-folder-name/public/en/customer/login

Also, check in your database that user exists or not with password.