GLIBC_2.28 needed

[hbarnard]

Setting up libc6:amd64 (2.27-3ubuntu1.6) ...
Setting up libc6:i386 (2.27-3ubuntu1.6) ...
Setting up libc6-i386 (2.27-3ubuntu1.6) ...
Setting up libc-dev-bin (2.27-3ubuntu1.6) ...
Setting up libc6-dev:amd64 (2.27-3ubuntu1.6) ...
Setting up libc6-dbg:amd64 (2.27-3ubuntu1.6) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
Processing triggers for libc-bin (2.27-3ubuntu1.4) ...
hbarnard@hbarnard-OptiPlex-9020:~/Downloads$ voice2json --help
/usr/lib/voice2json/usr/local/bin/python3: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.28' not found (required by /usr/lib/voice2json/usr/local/bin/python3)

I'd guess this is partly from use of Linux Mint rather than Ubuntu? However, I'm not planning to try and upgrade because of the risks to the rest of the system. Any other possibilities? Docker downloads everything it needs but doesn't start a container, same problem perhaps?