Internal Server Error when i make click in usage

### How are you running Flagsmith

- [ ] Self Hosted with Docker
- [X] Self Hosted with Kubernetes
- [ ] SaaS at flagsmith.com
- [ ] Some other way (add details in description below)

### Describe the bug

Hi,
We have a Flagsmith magnament in our cluster of Kubernetes.
This deployed with Template chart with version 0.51.0.
So when i make click in the botton usage we have the following error: 500 Internal Server Error
We do not know if this problem was fixed with a higher version.
That's why we need your help to solve the problem.

### Steps To Reproduce

1. Go to clik in usage
2. We have the the following error: 500 Internal Server Error

### Expected behavior

We would like to be able to access the Usage plan

### Screenshots