CTFd Custom Login Page

Hello Guys hope everyone is good I am facing a problem where whenever I create a custom login page in the admin area under pages, I get an output which is not desired, it seems ctfd isn’t able to read the CSS files I had stored in the server. The image below is what ctfd displays.

on my local machine, everything works perfectly fine

I created the static page using HTML + CSS but also I tried with bootstrap + CSS still nothing seems to be working. they all produce the same result

if anyone can help me please let me know, its URGENT cause the event will begin soon.