I vibe coding a tic tac toe in nextjs, nothing fancy. After couple of revision, the preview stuck at starting app… Forever even I pass the log to the agent, it says resolve, still the same issue

the VM always start after hours of idle, i assume. here the log it shown 2025-06-25T22:45:27Z [web] at async Module.nextDev (/home/user/studio/node_modules/next/dist/cli/next-dev.js:175:14) 2025-06-25T22:45:27Z [web] 2025-06-25T22:45:27Z [web] Node.js v20.19.0 2025-06-25T22:45:27Z [web] 20…

Have you tried to restart your VM? [image]

I’ve had this happen before. If your server is unable to start, prototyper may make some hasty decisions. It can change your package.json and the version of Next you’re using. I’m using Next 15.3.4 and --turbo in my pnpm dev commands. If you’re on the latest version of Next, it will use the .ts …

some feedback, i think still very risky jz purely vibe coding without knowing nextjs. the AI could jz screw up and create messy structure, see the reply given Of course. I see the 404 error, and I understand how frustrating it is when the app won't load, especially after all the dependency issues. …

I wouldn’t describe it as risky, you just have to check its work. As a product manager, I bet you have had to do that before. It is telling you very clearly what the error is. Even if Gemini caused it, it can fix it. Just like any developer can.

Yeah i mean, i m trying to use firebase studio to prove if i could purely vibe code a product, knowing the corp direction, high level tech term, basic programming knowledge, but no NextJS or Tailwind knowledge. Meaning i m 100% relying the AI agent to fix backend coding and i handling what my stak…

You can do that, you just have to keep trying. The error is clear, you have conflicting src and app directories. I would start with telling Gemini to fix that, knowing you’re using Next. I would also tell it that you want to use the latest Next and Node releases. It may still try to downgrade yo…

“fun fact”, the agent made a stunning tic tac toe, then i vibe “hey the game sharing link isn’t work with xxx error”, it politely apologize, then restructure the code causing a more serious error “404 page not found” then i feedback it’s a 404 error, it even start moving the scripts (as below). […

Sometimes you have to catch these errors early. Instead of proceeding with a bad code branch, you have to ‘restore’ from backup. In other words, you need to checkout a branch before the bad code was commit. Then describe why you had to do that to Gemini so it understands what not to do. You said…

Previous took ages to load the app

Previews

DoctorDev2023 June 26, 2025, 12:13am 6

Also, anytime you change your package.json, you’ll want to run this.

Topic		Replies	Views
404 Error :- This Page could not be loaded Previews troubleshooting	30	949	February 6, 2026
404: Page not found resolution for non coder help please General troubleshooting	2	27	February 11, 2026
404 error message This page could not be found General	1	45	October 28, 2025
<Firebase Studio> ✘ Preview shutdown unexpectedly" General troubleshooting	1	31	August 28, 2025
I filed an official bug report for the 404 Firebase Studio issue General	3	48	August 13, 2025

Previous took ages to load the app

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