Macbook Pro does not load a certain websites

Hi All,

My macbook does not load a certain websites. I keep getting the site cannot be reached (OS 11.0.1)

ERR_NAME_NOT_RESOLVED.

I can not ping the website from that macbook, or do a nslookup

ping: cannot resolve https://gtm.company.biz: Unknown host

I can however reach it from another device connected to the same network.

I tried to flush the DNS

sudo killall -HUP mDNSResponder;

I Checked the hosts

##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting.  Do not change this entry.
##
127.0.0.1       localhost
255.255.255.255 broadcasthost
::1             localhost


127.0.0.1 localhost.vdsnb.com

I rebooted in safe mode (does not solve it)

I allowed a guest user on the mac, that can reach the website.

I suspect a local file may be corrupted, but i'm not sure which one (mDNSresponder?) and if i can replace it with one from another macbook.

Any ideas?