nginx download fails during install, bith on ubuntu 20.04.02 and 18.04.5

[perariontaeadastra]

Attach the following commands output

• lsb_release -a :
• No LSB modules are available.
  Distributor ID: Ubuntu
  Description: Ubuntu 18.04.5 LTS
  Release: 18.04
  Codename: bionic
• [] nginx -V :
  Nginx has been already installed by Plesk installation, which I was going to replace. Worked on my previous servers without problems.
  Describe the bug
  I wanted to replace Nginx shipped with Plesk with a Nginx-ee and it worked well before. I tried on Ubuntu 20.04.02 and on 18.04.5 with the same result. Nginx-ee log file has been attached.

Probably, the issue comes from this line - curl -sL https://nginx.org/en/download.html 2>&1 | grep -E -o 'nginx-[0-9.]+.tar[.a-z]*' | awk -F "nginx-" '/.tar.gz$/ {print $2}' | sed -e 's|.tar.gz||g' | head -n 2 | grep 1.18 2>&1, since 1.18 is now a legacy version. Replacing it with 1.20 returns a value, but not with 1.18

Thank you.
nginx-ee.log