w3af installation error on kali linux 2020.3

Hello,

I'm posting this question after putting significant efforts to install w3af on Kali Linux 2020.3. The kernel version is 5.7.0-kali1-amd64.

Followed several URL's to install "w3af" in different ways but had no success. Some of them are,

http://docs.w3af.org/en/latest/install.html
https://raw.githubusercontent.com/an...nx/install.rst
https://gitlab.com/kalilinux/packages/w3af

The actual problem is,

executing "w3af_console" gives python-pip error as stated below.

#################################################
root@kali:~/w3af# /tmp/w3af_dependency_install.sh
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package python-pip is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
python3-pip


E: Package 'python-pip' has no installation candidate
#################################################
The problem is, python3-pip has already installed and functional I assume.

Current python version is 3.8.4.

Even, "w3af_gui" isn't working & given "webkitgtk" error. But, first I need to solve this error.

Kindly help,

Nishith N.Vyas