Zend certified PHP/Magento developer

Magento 2: Admin user getting 403 forbidden error from API requests

In my Magento 2 application I am simply trying to make a POST request to the /rest/V1/integration/admin/token enpoint to get an admin token for subsequent requests. My user is an admin user in the application and I am able to login to the admin dashboard with my username and password. On the dashboard, I am able to see that my user has been assigned the role of administrator, and I can also see that the administrator role is granted full access to all of the application.

Yet, I still get 403 forbidden errors when trying to retrieve an admin token via the API. I have worked on another magento 2 application before, and I was able to retrieve my admin token just fine, so I am not sure what is the issue in this case. Any help would be appreciated