Flasgger Reports Errors on Apache Server but Works Fine on Local

[Hongwei-W]

Hi there, I was working on a local Windows machine with flask==2.3.2, flask-restful==0.3.10, and flasgger==0.9.7.1. My flasgger initializes in create_app() as Swagger(app). And each endpoint with @swag_from({path_to_a_yml_dir}). This worked fine on my local machine, no error showed up. However, after I deployed on my Apache server with the same libraries versions, it showed me the following page

This page persisted after I deleted all swag_from and deleted the entire yml directory. Might you have any ideas why? Any help is appreciated.

Thanks.