I was using the version that came with the package manager of ubuntu 22.04 - v1.29.2 🫣 Thanks for pointing out that the version might be old.
After updating docker-compose to the latest version, the interpolation errors have gone away.
Now, the pending issue is the same as VSS blueprint 2.2.0 - ERROR Failed to load VIA stream handler - Failed to generate TRT-LLM engine. I will try to use the workarounds suggested there and see if I can get the blueprint to run successfully.