Separate thread for vertex integration,

Error: Background image generation/conversion failed (Vertex AI): AI generation (Vertex AI) did not return a valid image URL or content type for background. Output media URL or content type not found in Vertex AI response. No blockReason and no candidates with finishReason found in response to explain missing media.

Error: Background image generation/conversion failed (Vertex AI): AI generation (Vertex AI) did not return a valid image URL or content type for background. Output media URL or content type not found in Vertex AI response. No blockReason and no candidates with finishReason found in response to explain missing media.