Ansible Navigator is a text-based command-line version of AAP/AWX (with some limitations), and I use it to test and troubleshoot newly created execution environments.

Ansible Navigator can be installed with pip.

$ pip install ansible-navigator

Once installed, create an ansible-navigator.yml configuration file, and point to the execution environment image, along with your inventory and ansible.cfg file.

$ cat ansible-navigator.yml 
---
ansible-navigator:
  ansible:
    config:
      path: "/example/ansible.cfg"
    inventory:
      entries:
        - "/example/ansible_inventory"
  execution-environment:
    image: "localhost/ee:latest"
    pull:
      policy: "missing"

Then run a playbook using Ansible Navigator with the following command:

$ ansible-navigator run playbook.yml

If everything goes smoothly, you should have a functioning execution environment that AAP/AWX can use.