Can't execute google colab

[maxim-uvarov]

I wasn't able to execute demos both localy and in google colab.
In google colab it gives me the error.

[Duayt]

There were breaking changes in v0.4.28 version
https://github.com/cadCAD-org/cadCAD/blob/master/documentation/cadCAD-v0.4.28-Model-Upgrade-Guide.md

Need to change experiment.append_config to experiment.append_model