Checklist
- Have you pulled and found the error with
jc21/nginx-proxy-manager:latest docker image?
- Are you sure you're not using someone else's docker image?
- Have you searched for similar issues (both open and closed)?
Describe the bug
After the update to version 2.13.x my certficate tab stays empty.

The console of my browser give me this error mesage:

Nginx Proxy Manager Version
Bug starting from version 2.13.0, could reproduce the behaviour since 2.13.4.
To Reproduce
Steps to reproduce the behavior:
- Update to version 2.13.x'
- Click on 'Certificates'
- See error - the page is empty, console shows the error
Expected behavior
This is what the certficates tab shows me still version 2.12.6
