When i try to activate the kodama addon in blender it stop working and later it appear this error

Did you install Pside6? It is a Python Module that Kodama needs.

You need to check which Python Modules you need to install before trying to run Kodama Addon! There might be a drop-down in the preferences of the addon that downloads these dependencies…

Hi there and welcome to Blender Artists,
Like @RSEhlers said, you need to install PySide6, you should be able to do this using PIP, or the Python Package Index. Since this is for a Blender addon, it looks like there are more steps than usual, since it needs to install into a specific location.

Launch Blender and open the Python console from the scripting tab. Paste this code:

import sys
print(sys.executable)

Copy the output to your clipboard and put it in a text document.

Open your terminal, for this I am using PowerShell, but it will be the same on other terminals. Navigate to the path on your clipboard, using the CD command cd "PATH\python\bin"

Then update PIP to prevent issues: python.exe -m pip install --upgrade pip

Then, you can install PySide6 with the command python.exe -m pip install PySide6 --target="PATH\python\lib\site-packages"

Let me know if you have any issues.

Is Kodama even compatible with 5.1?