HTB Academy Uploading a webshell Problem

Getting started module

I was able to successfully enter the website using valid credentials. The purpose (in my Opinion) is to upload a webshell in a section where it allows uploading files, but this function does nothing and I did not find another place where I could upload files or some type of GET request for a php file. The only thing that can be done in this section is to create a folder, and also try to upload a file in said folder, but it still won’t stop.
Any ideas

Are you try to use Burp Suite and change the Mime Type in the Header?
I don’t have the answer to your question but it hope help you