Describe the bug
Any attempts to call another policy through ak_call_policy throw the following error:

 'NoneType' object has no attribute 'pk'

To Reproduce
Steps to reproduce the behavior:

1. Create a policy named test-policy with the following expression:

return True

2. Create a second policy with the following expression:

result = ak_call_policy("test-policy")

return True

3. Run the policy on any object, through the "Test" action button.

Expected behavior
The test-policy should be called, and return a PolicyResult object as described here.

Version and Deployment (please complete the following information):

• authentik version: 2024.2.2
• Deployment: docker-compose