Fix Next.js + Supabase Dashboard Bug (Data Not Rendering / Infinite Loop)

I have a dashboard built with Next.js, React, and Supabase (deployed on Vercel) that started glitching. It was showing order tracking data with summary notes, then dropped to just a sales number, then stopped showing data entirely, and now it's stuck in an infinite loop. I need someone experienced with Next.js, React, and Supabase to find the root cause, fix the loop, and restore full data rendering. Small, focused bug fix, quick turnaround.