#977513 apt/apt-get doesn't work

Package:
apt
Source:
apt
Description:
commandline package manager
Submitter:
larhama
Date:
2020-12-16 00:15:03 UTC
Severity:
normal
Tags:
#977513#5
Date:
2020-12-15 20:05:25 UTC
From:
To:
Running 'apt update' or 'apt-get update' results in following output:

Get:1 <http://security.debian.org/debian-security> buster/updates
InRelease [3,201 B]
Err:1 <http://security.debian.org/debian-security> buster/updates
InRelease
Clearsigned file isn't valid, got 'NOSPLIT' (does the network require
authentication?)

however I can download the InRelease file just fine with wget. Ping
also works and I don't have a proxy configured. Do I need to supply
some credentials for apt to work and if so, why? What are those
credentials?
#977513#10
Date:
2020-12-15 23:56:13 UTC
From:
To:
The Debian archive does not require authentication. This sounds more like a malformed entry in /etc/apt/sources.list. Can you paste the line(s) containing security.debian.org?
#977513#17
Date:
2020-12-16 00:12:39 UTC
From:
To:
Replying to add the submitter to the thread.