Can't find slider on backend

Hi,

How can I edit the slider? I’m looking for it on the backend but I can’t find it. And when I go to customise. I always got this error.

===================================
The mydomainname.com page isn’t working

mydomainname.com is currently unable to handle this request.
HTTP ERROR 500

When I use my developer tool and check console, This are the errors.

Failed to load resource: the server responded with a status of 404 (Not Found)
load-scripts.php:9 JQMIGRATE: Migrate is installed, version 1.4.1
2widget-upload-image.js
Failed to load resource: the server responded with a status of 404 (Not Found)
4customize.php
Failed to load resource: the server responded with a status of 500 (Internal Server Error)
font-awesome.min.css
Failed to load resource: the server responded with a status of 404 (Not Found)

Do you think, this have something to do with the access error that I’m experiencing right now?

Thanks

Hello there,

To rule out theme-specific issue, could you please try to temporarily switch to the default WordPress theme like Twenty Seventeen, and then visit the customizer panel? If it is continue happening, please read this article which provides tutorials on how to fix it.

Regards,
Kharis