Trouble installing python3-rosdep. (python3-docutils is missing or obsolete?) [closed]

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Hello, I have the following problem installing python3-rosdep via apt:

When I try to run

sudo apt install -y python3-rosdep

I get the following response:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 python3-rosdep : Depends: python3-catkin-pkg but it is not going to be installed
                  Depends: python3-rosdistro but it is not going to be installed
                  Depends: python3-rospkg but it is not going to be installed
                  Depends: python3-rosdep-modules (>= 0.21.0) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

So what I did then, is I tried to install python3-catkin-pkg myself by running:

sudo apt install -y python3-catkin-pkg

With the following response:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
 The following information may help to resolve the situation:

The following packages have unmet dependencies:
 python3-catkin-pkg : Depends: python3-docutils but it is not installable
                          Depends: python3-pyparsing but it is not installable
                          Depends: python3-catkin-pkg-modules (>= 0.4.23) but it is not going to be installed

E: Unable to correct problems, you have held broken packages.

So naturally I tried to install python3-docutils:

sudo apt-get install -y python3-docutils

Which yielded a response that confused me a lot:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package python3-docutils 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

E: Package 'python3-docutils' has no installation candidate

Python3-docutils has no installation candidate?? I am very confused by this.

I am running Ubuntu focal 20.04.3

Help is greatly appreciated, Thanks a lot in advance