NGINX Ingress Controller `controller-v1.12.0` throwing 404 error

General Discussions
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I recently upgraded the NGINX Ingress Controller from version v1.11.4 to v1.12.0. The upgrade involved updating the image and reconfiguring the nginx.tmpl file to reflect the necessary changes. However, after applying the new configuration, I am encountering an issue where all ingresses are returning a 404 Not Found error.

I would appreciate any insights or suggestions on potential causes for this behavior. It’s unclear whether this is due to the configuration changes, the version upgrade, or something else entirely. Any help in troubleshooting or resolving this issue would be highly appreciated.

Thank you in advance.

Cluster information:

Kubernetes version: v1.31.1

Controller information:

NGINX Ingress controller
  Release:       v1.12.0
  Build:         ba73b2c24d355f1cdcf4b31ef7c5574059f12118
  Repository:    https://github.com/kubernetes/ingress-nginx
  nginx version: nginx/1.25.5