Just documenting what I tried and what happened, in case it's helpful to you:
1. Delete all existing docker containers and volumes.
2. git pull
3. Add this to docker-compose.yml: - OLLAMA_HOST=http://host.docker.internal:11434
4. docker compose up --build
5. Visit localhost:3000/w/
6. Create an account.
7. Enter PIN.
8. Log in.
9. Observe the initial workflow with only the 'Start' block.
10. In the sidebar, click the 'Agent block'.
11. In the newly-created 'Agent' block, choose one of my local (ollama) models.
12. Click 'Run'.
Step 11 works. Step 12 results in a red error message "Workflow execution failed: Invalid block type: undefined {}".