Hi Punchi
Sorry for the trouble on email notification.
Custom Vision from computer vision was depreciated in favor of Custom vision portal
Features like Azure AI Image Analysis 4.0 Custom Image Classification, Custom Object Detection, and Product Recognition preview API from Azure compute vision has been retired on March 31 2025
So, API calls to model with these services are failing.
Reference -
Recommendation
You can create a new model in custom vision portal to re-create the same model with same storage dataset
Minimum 5 images is required for image classification (10 for object detection)
Reference -
Getting started with custom vision portal
Please let us know if it helps you migrate to custom vision
Thank you for understanding.