How do I apply the SDK?

I am testing the SDK to apply it to a real server.
It works fine on localhost.
However, on the actual server, the following error occurs.

real test server url is http://3.37.133.186:3300/jetema/

botOptions.JWTUrl = “http://3.37.133.186:3300/jetema/kore_sdk/api/users/sts”;
I already created that folder.

error :

Index of /jetema/kore_sdk/api/users/sts

Index of /jetema/kore_sdk/api/users/sts

[ICO]NameLast modifiedSizeDescription

[PARENTDIR]Parent Directory   -  

Please give me an answer that can solve the problem.