[microsoftexpert/terraform-google-vertex-ai-index-endpoint]: pass the network as projects/{project number}/global/networks/{name}: wiring a VPC module's id or self_link (the project ID form) fails apply. network and private_service_connect_config are mutually exclusive, set at most one. Index Endpoint creation fails when network is set unless Private Services Access is established for the target network, so confirm the service networking connection completed and add an explicit depends_on. IAM grants can take up to 60 seconds to propagate: re-run apply before treating a permission-denied as a code defect.

Context: The most common Terraform failures for Vertex AI index endpoints are schema and networking mismatches. Each has a precise fix.

## Matched source
Source: Source: https://github.com/microsoftexpert/terraform-google-vertex-ai-index-endpoint
Original query: "Vertex AI index endpoint Terraform: network takes a project number, not a project ID"
Key terms: endpoint, index, network, number, project, takes, terraform, vertex