It looks like ludwig-ai/ludwig#2673 fixes one protobuf issue in our tutorial/demo colab notebooks, but there's now a new protobuf error that happens during the training of Ludwig models, if tensorflow is also installed:

[libprotobuf FATAL google/protobuf/stubs/common.cc:87] This program was compiled against version 3.9.2 of the Protocol Buffer runtime library, which is not compatible with the installed version (3.17.3). Contact the program author for an update. If you compiled the program yourself, make sure that your headers are from the same version of Protocol Buffers as your link-time library. (Version verification failed in "bazel-out/k8-opt/bin/tensorflow/core/framework/tensor_shape.pb.cc".)

I'll recommend that we proceed with this change to explicitly uninstall tensorflow in our tutorial/demo colab notebooks.

Confirming that this is still an issue with tensorflow's 2.11.0rc1 pre-release.