Trailer error "Not Found" and Dashbord empty

Hello! I was told to reach out to you if the same issue persisted.

I can't upload or view any of my submission on the trailers dashboard.

Link to verify: https://kisskh.at/admin/dashboard 

Trailer staff, using laptop, Windows 11.

Tried using different browser, clearing cache memory. No result, so waiting your reply. Good day!