netselect-apt not working

Suddenly, in my MX-Linux 19.4, netselect-apt is not working properly.
This is what I type in the terminal.
`sudo netselect-apt`
And the output I get is given below.
`Using distribution stable.
Retrieving the list of mirrors from www.debian.org...

URL transformed to HTTPS due to an HSTS policy
--2021-06-07 10:00:38-- https://www.debian.org/mirror/mirrors_full
Resolving www.debian.org (www.debian.org)... 149.20.4.15, 128.31.0.62, 130.89.148.77, ...
Connecting to www.debian.org (www.debian.org)|149.20.4.15|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 129505 (126K) [text/html]
Saving to: ‘/tmp/netselect-apt.LNOZdD’

/tmp/netselect-apt.LNOZdD 100%[=======================================================================================================>] 126.47K 172KB/s in 0.7s

2021-06-07 10:00:40 (172 KB/s) - ‘/tmp/netselect-apt.LNOZdD’ saved [129505/129505]

Choosing a main Debian mirror using netselect.
netselect-apt was unable to obtain a list of valid hosts from
the file downloaded from the url 'http://www.debian.org/mirror/mirrors_full'.
This might happen because of any of the following reasons:
- there was an error in the file
- the file is not in the format netselect-apt expected
- there is a bug in netselect-apt
Please manually check the file. If you believe its contents are correct, file
a bug (hint: use 'reportbug') against netselect-apt and provide the file as
well as the output generated by the program (hint: use 'script').
`
I am unable to find out why is this happening. Anyone knows why?