A PC equipped with advanced AI capabilities and Windows Copilot integration
Not your fault,this is a known Copilot bug, all over Microsoft's own support forums. Copilot tells you to click "Start" on a "task card" that never actually shows up. It writes the text response but the actual clickable card never loads. Tons of other people are hitting the exact same wall.
Microsoft's official fix is basically: start a new chat and try the same prompt again, sometimes the card appears that time. If not, try it on Copilot's website instead of the app. If you're on the app, go to Settings > Apps > Microsoft Copilot > Advanced options, hit Repair, then Reset, and reinstall as a last resort.
Faster way around it: open a new chat and say "generate the invitation image now, don't make a task or plan, just output it here." If it still tries to hand you a task card, forget Copilot chat altogether and go straight to design.microsoft.com or use the Designer pane inside PowerPoint. same image engine, no broken card step in the way.
You didn't miss a button. It was never there.