runtime error

Traceback (most recent call last): File "/usr/local/bin/tensorboard", line 5, in <module> from tensorboard.main import run_main File "/usr/local/lib/python3.8/site-packages/tensorboard/main.py", line 27, in <module> from tensorboard import default File "/usr/local/lib/python3.8/site-packages/tensorboard/default.py", line 32, in <module> from tensorboard.plugins.audio import audio_plugin File "/usr/local/lib/python3.8/site-packages/tensorboard/plugins/audio/audio_plugin.py", line 23, in <module> from tensorboard import plugin_util File "/usr/local/lib/python3.8/site-packages/tensorboard/plugin_util.py", line 20, in <module> from tensorboard._vendor.bleach.sanitizer import Cleaner File "/usr/local/lib/python3.8/site-packages/tensorboard/_vendor/bleach/__init__.py", line 5, in <module> from tensorboard._vendor.bleach.linkifier import ( File "/usr/local/lib/python3.8/site-packages/tensorboard/_vendor/bleach/linkifier.py", line 4, in <module> from tensorboard._vendor import html5lib File "/usr/local/lib/python3.8/site-packages/tensorboard/_vendor/html5lib/__init__.py", line 25, in <module> from .html5parser import HTMLParser, parse, parseFragment File "/usr/local/lib/python3.8/site-packages/tensorboard/_vendor/html5lib/html5parser.py", line 2, in <module> from six import with_metaclass, viewkeys ModuleNotFoundError: No module named 'six'

Container logs: