I get this error every time I run Generative expand

[apolloreyes]

Pls if anyone can help me fix this . . . 

I get this error every time I run Generative expand

[Jeff Arola]

Is the Generative Expand when using the Crop Tool?

What version of Photoshop and macOS are you using?

[c.pfaffenbichler]

Could you please post complete screenshots with the pertinent Panels (Toolbar, Layers, Options Bar, …) visible? 

What have you done for all-purpose trouble-shooting so far?
Restoring Preferences after making sure all customized presets like Actions, Patterns, Brushes etc. have been saved might be a good starting point:
https://helpx.adobe.com/photoshop/using/preferences.html
https://helpx.adobe.com/photoshop/kb/basic-trouble-shooting-steps.html
https://helpx.adobe.com/photoshop/kb/troubleshoot-gpu-graphics-card.html