The latest build of package of python-anyio for aarch64 has version number 0.0.0. The directory in site-packages reads "anyio-0.0.0-py3.9.egg-info" and the "Version" section in "PKG-INFO" is also 0.0.0.
Can confirm this issue. The jupyter server is unusable due to this bug. However, changing the version line in "/usr/lib/python3.9/site-packages/anyio-0.0.0-py3.9.egg-info/PKG-INFO" to 2.1.0 manually will fix this issue.