Community,
From the New in 8.1.25 entry in the docs and the Release Notes we completely missed the addition of the system.iec61850 module, and for that we apologize.
But today we've fixed that and published version 8.1.25.post4 for ignition-api and ignition-api-stubs.
If you've already installed ignition-api, just run:
python2 -m pip install --upgrade ignition-api
And for ignition-api-stubs:
python3 -m pip install --upgrade ignition-api-stubs
Thanks!