Hi, yes, this error happens because Blender 4.5 changed parts of the UV API, and Zen UV 3.3.2 is not compatible with it. Zen UV 3.x was built for earlier Blender versions.
For Blender 4.5 you’ll need Zen UV 5, which includes the updated API support.
You have two options:
• Update to Zen UV 5 (recommended)
• Or use Blender 4.4 or earlier with Zen UV 3.3.2
Major Blender releases often require significant internal updates on our side, which is why compatibility is handled in major Zen UV versions.