Problem when running an example with visualizer

[RalphRebello]

In the /ndnSIM/ns-3 folder, i execute the command ./waf --run ndn-simple --vis, it compiles, but the visual part does not load and generates this output:

Traceback (most recent call last): File "<string>", line 1, in <module> File "/home/ralph/Apps/ndnSIM/ns-3/src/visualizer/visualizer/__init__.py", line 2, in <module> from .core import start, register_plugin, set_bounds, add_initialization_hook File "/home/ralph/Apps/ndnSIM/ns-3/src/visualizer/visualizer/core.py", line 24, in <module> import ns.core File "/home/ralph/Apps/ndnSIM/ns-3/build/bindings/python/ns/core.py", line 5, in <module> from . import _core ImportError: cannot import name _core

[RalphRebello]

I solved this problem criating a symbolic link that point to the original librarie, inside the folder /ndnSIM/ns-3/build/bindings/python/ns/ with the name _core.so just.

Now my problem is this:
ralph@note-ralph:~/Apps/ndnSIM/ns-3$ ./waf --run=ndn-simple --vis Waf: Entering directory /home/ralph/Apps/ndnSIM/ns-3/build'
Waf: Leaving directory /home/ralph/Apps/ndnSIM/ns-3/build' Build commands will be stored in build/compile_commands.json 'build' finished successfully (17.847s) Traceback (most recent call last): File "<string>", line 1, in <module> File "/home/ralph/Apps/ndnSIM/ns-3/src/visualizer/visualizer/__init__.py", line 2, in <module> from .core import start, register_plugin, set_bounds, add_initialization_hook File "/home/ralph/Apps/ndnSIM/ns-3/src/visualizer/visualizer/core.py", line 25, in <module> import ns.network ImportError: No module named network

The lib "ns.network", i dont know if the lib have some problem, or if dont have in my computer.

[ahmadabrar2022]

Try this
https://youtu.be/QJpGwynTiok
Ubuntu 20.04 and ndnSIM 2.8