Python Flask doesn't serve custom 500 template/return on IIS

Question

I am using Flask and blueprints on IIS. My issue is that when the 500 error is triggered it loads the default IIS 500 template and not what I want.

I've tried several things and this is where I am. I have the following code

from flask import render_template,Blueprint
errorbp = Blueprint("errorbp",__name__)

@errorbp.app_errorhandler(404)
def page_not_found(e):
    return "404", 404

@errorbp.app_errorhandler(500)
def internal_server_error(e):
    return "500", 500

If I visit a page that does not exist, I get "404" back as intended. If I create an error on purpose, I get the following

Any suggestions as to what to do? I presume I may need to do something with IIS at this point but what? I've edited/remove the 5xx status codes/page and still nothing

Answer 1

What you need to do is, open the error pages module, double-click the 500 status code , set the path of your template in the file path , and IIS will send the content of the file as a custom error response.

In addition, IIS has two other ways to respond to an error: by executing an URL or by redirecting the request.