Error Running script in file convert_raspbian_docker.py

[pfs-db]

Hello, I'm facing issues compiling, used git clone on this repo sitory, then I run
$ sudo ./process.script.sh ros2
The output is too big, so i will go to what is important if needed i can post everything

OUTPUT:
Successfully built a7730e31e790
Successfully tagged ros2-raspbian:crosscompiler
Traceback (most recent call last):
File "./convert_raspbian_docker.py", line 229, in
image_filename=args.image)
File "./convert_raspbian_docker.py", line 165, in main
timestamp = '{}{}{}'.format(match.group(1), match.group(2), match.group(3))
AttributeError: 'NoneType' object has no attribute 'group'

Here end the compiling of the sh file.
Whats called my attention was that:

ROS2 cross-compailing for Raspberry-Pi 3
Warning: apt-key output should not be parsed (stdout is not a terminal)
gpg: keyserver receive failed: Cannot assign requested address
Hit:1 https://download.docker.com/linux/ubuntu bionic InRelease
Get:2 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Hit:3 http://archive.ubuntu.com/ubuntu bionic InRelease
Get:4 http://packages.ros.org/ros/ubuntu bionic InRelease [4669 B]
Err:4 http://packages.ros.org/ros/ubuntu bionic InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F42ED6FBAB17C654
Hit:5 http://archive.ubuntu.com/ubuntu bionic-updates InRelease
Get:6 http://archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Reading package lists... Done
W: GPG error: http://packages.ros.org/ros/ubuntu bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F42ED6FBAB17C654
E: The repository 'http://packages.ros.org/ros/ubuntu bionic InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Here is the entire output: https://github.com/PabloFreitasUfsc/uRos-Projekt/blob/master/Output_ros2.txt

My docker file looks like is working fine and i already try agent and client parameters and give the same error.
How can i make my doubt more clear?
Thanks for the post.

Edit1:

I keep trying and did nothing diferent but sometimes( rarely) the output was diffent (https://github.com/PabloFreitasUfsc/uRos-Projekt/blob/master/Diferent_output.txt)
This one passed the featching raspbian image inside the docker.