404 Not Found during OPTIONS API request to zm/api/monitors/_.json

[justanhy]

Describe Your Environment Server

• ZoneMinder 1.34.26
• Ubuntu Installation
• Ubuntu 18.04.5 LTS

Machine + Browser

• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0

Describe the bug I'm connecting a web UI with Zone Minder through API calls and I'm trying to use the DELETE Monitor API. Since I'm using fetch() from the browser, I had to enable CORS on my apache server by adding this to a new config file

Header always set Access-Control-Allow-Credentials true
#Allow requests from Thingsboard
Header always set Access-Control-Allow-Origin "*"
Header always set Access-Control-Request-Methods "*"
Header always set Access-Control-Request-Headers "*"
Header always set Access-Control-Allow-Methods: "*"
Header always set Access-Control-Allow-Headers "*"
Header always set Access-Control-Expose-Headers "*"
Header always set Access-Control-Max-Age "1000"
RewriteEngine On
RewriteCond %{REQUEST_METHOD} OPTIONS
RewriteRule ^(.*)$ $1 [R=200,L]

However, the preflight OPTIONS request to http://<myserver>/zm/api/monitors/<number>.json returns "404 Not Found" and I'm not sure why?

To Reproduce Steps to reproduce the behavior:

1. Ensure CORS is enabled for your apache server
2. Create a button that makes an delete api call onclick
3. Look at the browser console log

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