it was just working fine all of this time, then the new VS view changed everything, and now my workflow is messed up since I cant view in the preview anymore 
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Hey there, have you copy and pasted that image into the chat and asked what is causing this?
Maybe you, through work started an AUTH which requires log in to view? If this is the case, sometimes you will only see the landing page – somethings, nothing, or maybe refresh? If you have A LOT going on in the background it may require a refresh. First try to copy and paste that image and see what chat says
”do I have some AUTH setup that is not allowing me to view the current preview, or is this something else?
Best,
J
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Are you still experiencing this issue?
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Having exactly the same issue, the new interface broke everything for me and is downright unusable at this moment. How can we revert back to the well oiled machine that the previous interface was?
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Sorry that you’re seeing this folks! Can you share chat links with us? In the meantime, does duplicating chats help?
It’s really frustrating. I’ve been previewing an app fine, and then all of a sudden I get the dreaded message:
Please fix this ASAP! I know I can preview fine. If you want to add a warning, fine. But don’t make me open a new window and all that. It messes with my flow (and ability to edit the code because editing code is not an option when you have to do the new window preview).
I flagged this internally. Thank you!
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I have been working on my project with v0 for over a month now and it was a breeze until yesterday.
Problem
Not sure what happened there, but suddenly the embedded preview stopped working and the whole workflow fell apart. The reason stated by v0 is:
Found authentication libraries used in the generated code, which might not work as expected in the embedded preview due to browser restrictions. To see the preview, open in a new tab.
Current Behavior
- It all worked just fine in past branches (and still works if I reopen their chats).
- Any new branch I’m trying to create now has sudden issues with it, even though no code has changed in between.
- Example chat: https://v0.app/chat/aevelcz-lasertag-gg-OK10lV5IPV9
- Was working up until here: https://v0.app/chat/tournament-edits-and-templates-aG9124YEGhi (now suddenly isn’t working anymore as well)
Impact
The separate tab preview mode is significantly less effective for my workflow:
- It keeps breaking things.
- It fails on simple tasks that previously worked in the embedded form.
- It misses the critical Fix for free with v0 buttons that offloaded some of the burden when
v0was acting up.
What can I do to go back to the original workflow?
2 Likes
Hey Aevelcz!
I actually went through something very similar recently. I’d been working on a project for months, saw a new update, clicked a button, and suddenly panicked — previews weren’t behaving as expected and my whole workflow felt broken.
Regarding your issue: I also have a fairly involved project, and once I set up authentication, I noticed some odd preview behavior:
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Sometimes only the landing page renders in the embedded preview
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Occasionally it works after a refresh (either the internal browser or the full page)
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Other times, pushing a new prompt causes the preview to suddenly appear
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But once auth is enabled, I generally can’t preview past the landing page in the embedded view
Because of that, I’m guessing authentication is likely the root cause here.
You might try explicitly asking something like:
“Do I have authentication set up that’s preventing the embedded preview from rendering, or is something else causing this?”
It can also help to paste a screenshot of the preview error directly into the chat and ask v0 what’s blocking it. 
My guess is the embedded preview is restricted due to browser/auth limitations.
Clicking “open in new tab” may still show the same thing if auth is active — which, honestly, is probably what you want if you’re building a login system. In that case, it’s actually a sign your auth is working as expected.
About the “original workflow” feeling broken
As for going back to the old workflow — this seems to be part of the new v0 update, not a regression. After a couple of pull requests (especially if you’re connected to GitHub), it starts to feel much smoother.
The new approach breaks work into smaller, localized chunks, which makes it easier to:
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Isolate issues in a duplicate branch
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Identify exactly where a change lives in the repo
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Fix specific problems without touching unrelated code
What’s been working really well for me:
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After a major update, I publish and merge
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Keep a clean
main -
Continue work from there or duplicate as needed
Prompt pattern that’s helped me a lot
To avoid stress with the new workflow, I start every single new chat with something like this (without fail — it saves a lot of headaches):
Continue from main.
The site is live and working with the latest merged changes.
Environment variables are already configured and should not be modified unless explicitly requested.
Please analyze the existing codebase and project files to understand the current structure and data flow before making changes.
Do not rely on prior chat history.
Always ask me before implementing changes.
If you use specific sources, you can also add rules like:
RULES: Always use source “XYZ” unless explicitly told otherwise.
Then your next task goes right after that.
For your specific case
A good next task might be:
Confirm why I can’t view the embedded preview.
If this is caused by authentication, do not change anything unless I confirm.
Is there a way to temporarily disable auth so I can view the preview during development?
That said, if your auth is set up correctly, you can feel confident publishing and merging PRs. My site is live and connected, so I usually just refresh and see the changes.
One last tip
Before I ever click Publish, I always hit the Code button next to the preview to confirm the code is present and correct. That’s saved me from publishing broken states more than once.
Hope this helps — you’re definitely not alone here.
Best,
J
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That said, it’s also totally possible this is just an internal or transient issue on v0’s side, in which case feel free to disregard everything above. I mainly wanted to share what I’ve personally run into and a few workflow tips that helped me stay confident things were still working as expected.
Because, I promise, when I say I panicked - I PANICKED L O L
Someone was talking to me, -me as I sweat with dread & fear- “I’m sorry I can’t talk right now”
Good luck and happy building my friend!
-J
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they should just change back to the original, where users can push and pull from github manually. The new update is trying to make everything auto sync however normal users cannot bear with constant interface change! this is just a pain in the a**.
and i just do not get why they think reordering the folder is any helpful. We want to explore V0 by having chats under project and clear Github integration. What’s worse is when duplicate a new “branch” it created another branch of git instead updating to the designated one. GOD this is so unhelpful
What is the pain point for you in the automatic workflow? I’m trying to understand to flag better to the v0 team
What isn’t clear?
I’m experiencing the same preview issues. It’s frustrating and currently blocks my workflow.
also:
- the new DB tab also isn’t connecting, and the error is unclear: “Failed to load schema. No database URL found in integration environment variables. Available keys: SUPABASE_SERVICE_ROLE_KEY.” It’s not obvious what’s missing or how to fix it.
- branching is also confusing: changes made (not pushed) are showing up when creating a new branch from an earlier version (v1).
I understand branching is the right long-term approach for production apps, but the rollout feels rough.
a temporary flag to disable the beta would help. Without preview, design changes aren’t usable, and constantly opening preview in a new tab isn’t practical.
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It sounds like you don’t have a database URL in environment variables - have you checked that?
When you create a new branch from an earlier version, it brings the context of that branch. What is confusing?
Appreciate this feedback!
I already added the database URL as SUPABASE_URL, but it’s not clear which variable I should use.
This is probably a bug: when I try to start a new chat from an earlier version, it creates a new chat that includes all the changes I made after that version. In this case, using v1 still includes all later changes in the new chat.
The same issue has recently affected all projects that received the last update, wasting time and tokens. No matter what I try, I keep getting this consistent error in both PREVIEW AND LIVE DEPLOYED PROJECTS: Browser Restriction Detected. It finds authentication libraries in the generated code that might not work as expected in the embedded preview due to browser restrictions. To view the preview, open it in a new tab. None of the solutions I tried have worked.
I simply can’t ship.
Since the beta rolled out, my build productivity has dropped to 5% due to:
- Preview doesn’t work
- new git, while promising, is buggy and dramatically reduces shipping speed. e.g. how can i manually change code and then visit preview? i don’t think it’s possible anymore.