Sonnet-3.7 not working on vertex_ai?

[mtnsh]

Issue

in aider 0.75 -> updated everything and things are working on other tools, e.g. roo-code.
however im getting errs:

────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
Aider v0.75.1
Main model: vertex_ai/claude-3-7-sonnet@20250219 with architect edit format, prompt cache, infinite output
Editor model: vertex_ai/claude-3-7-sonnet@20250219 with diff edit format
Weak model: openai/gpt-4o-mini
Git repo: .git with 257 files
Repo-map: using 4096 tokens, files refresh
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

hi

litellm.BadRequestError: VertexAIException BadRequestError - vertexai import failed please run pip install -U "google-cloud-aiplatform>=1.38". Got error: No module named 'vertexai'

Version and model info

No response