# Preview broken agent goes round in circles trying to fix eating my $$$$
**URL:** https://replit.discourse.group/t/preview-broken-agent-goes-round-in-circles-trying-to-fix-eating-my/7203
**Category:** Agent & Assistant
**Created:** [September 20, 2025, 3:32am UTC](https://replit.discourse.group/t/preview-broken-agent-goes-round-in-circles-trying-to-fix-eating-my/7203 "2025-09-20T03:32:18Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@hello3628](https://replit.discourse.group/u/hello3628)
#### Post date: [September 20, 2025, 3:32am UTC](https://replit.discourse.group/t/preview-broken-agent-goes-round-in-circles-trying-to-fix-eating-my/7203/1 "2025-09-20T03:32:18Z")
So I’m building an app and it’s going well, it works when I’m developing it, however when I tap on the ‘Preview’ button after the agent has made an update, opening a new window, the app in preview mode is broken.
When I tell the agent this, it tries to make a bunch of changes but it looks like it doesn’t actually have access to the preview mode so it just guesses? It says it does a bunch of stuff, but it’s still broken, so again I tell it about the error message, goes off and adds more error handling etc but it’s still broken… all the while eating up my minutes off my $$$. I’m at the point now where I have stopped working on the app as it seems I’m asking it to fix a problem that in dev mode it can’t find?
I was wondering if maybe I should try publishing the app… but I don’t want it public yet, and does Google index it?
Here is the output from my agent preview fix loop:
**What You’ll Notice:**
- No more generic 500 “Unknown server error” messages
- Clear, specific error messages that tell you what went wrong
- Better reliability in Preview environment
- Proper error handling for file uploads, database connections, and validation
**Next Step:**
Please try creating assets in **Preview mode** now. You should see:
- Successful asset creation when everything is correct
- Clear, helpful error messages if something goes wrong (instead of generic 500 errors)
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### Author:  [@grayhill5](https://replit.discourse.group/u/grayhill5)
#### Post date: [September 20, 2025, 6:15am UTC](https://replit.discourse.group/t/preview-broken-agent-goes-round-in-circles-trying-to-fix-eating-my/7203/2 "2025-09-20T06:15:01Z")
Try this, it worked for me. Open the preview window in a Private/Incognito window and see if it works. If it does, it’s your browser. Hard refresh did not work, clearing cache did not work, I had to reset chrome to default, and safari, only then did things start working as I had the same problem as you are describing.
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### Author:  [@hello3628](https://replit.discourse.group/u/hello3628)
#### Post date: [September 22, 2025, 7:08am UTC](https://replit.discourse.group/t/preview-broken-agent-goes-round-in-circles-trying-to-fix-eating-my/7203/3 "2025-09-22T07:08:06Z")
Hi. Thanks for your response. No dice. It has something to do with saving the assets. Going to try publishing
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### Author:  [@hello3628](https://replit.discourse.group/u/hello3628)
#### Post date: [September 22, 2025, 7:30am UTC](https://replit.discourse.group/t/preview-broken-agent-goes-round-in-circles-trying-to-fix-eating-my/7203/4 "2025-09-22T07:30:05Z")
So the app works when published. 🤷♂️
