EditableImage creation returns nil or fails

Issue
AssetService does not return a usable EditableImage, or the operation fails in a published test.

Cause
The API may require current creation methods, appropriate permissions, supported dimensions, and available memory.

Fix
Use the current AssetService workflow from Roblox documentation, check every returned value, and start with a small blank image. Confirm the experience and asset permissions before loading an existing asset. Reuse images instead of creating one every frame.

Verify
Create one small image, write a known pixel region, display it, and clean it up before scaling the system.

Official Roblox EditableImage and EditableMesh update