Process Generation Not Working - Appian Composer

I'm having trouble generating process objects in the "Compose your application plan" screen.

When I click "Generate Process" in the Process tab, it shows loading but then nothing happens - the tab remains completely empty and no process is generated.

And because process tab is empty I'm unable to generate objects from composer

Has anyone encountered this before? What could be causing this issue?

Appian Version: 25.4