General Smuggler

Hi, I downloaded a new custom kali and attempted to update it, this is the error message I am receiving:

root@kali:~# apt update
Get:1 http://kali.download/kali kali-last-snapshot InRelease [3,354 B]
Err:1 http://kali.download/kali kali-last-snapshot InRelease
Clearsigned file isn’t valid, got ‘NOSPLIT’ (does the network require authentication?)
Reading package lists… Done
E: Failed to fetch http://http.kali.org/kali/dists/kali-last-snapshot/InRelease Clearsigned file isn’t valid, got ‘NOSPLIT’ (does the network require authentication?)
E: The repository ‘http://http.kali.org/kali kali-last-snapshot InRelease’ is not signed.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.