I am working on 5 repls and yesterday 2 of them stopped allowing me to use the preview pane. I have attempted multiple fixes on both. The URLs work in a separate tab, not in the pane. Any Suggestions?
The agent and assistant have no clue how to fix this and it happens on every device and browser I try.
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Iām not seeing this issue on any of my apps, however, did just see this: HELP: Preview blank
Curious @ericgurr for the 2 apps with the issue, are there any things common between them? And for @chrisbarker3 - same thing? Perhaps there could be a commonality that could be noted here for Replit team.
Hey Eric - weāve seen this happen a couple of times on client projects recently.
If the URL works in a new tab but not in the Preview pane, here are a few things worth checking:
Make sure your .replit run command isnāt using localhost or 127.0.0.1 ā it has to bind to 0.0.0.0 or Replit wonāt display it in the pane.
Try switching to a different port like 3000 or 8080 if you havenāt already. Occasionally the preview pane bugs out with certain port combinations, even if external links still work.
Sometimes, toggling āPrivate Dev URLā off and back on again resets visibility issues for the pane. Weird, but has worked.
Also worth noting; the Preview pane has been inconsistent lately for some projects while the agent tab still loads fine. Might be a rendering bug on their end.
If youāre still stuck, happy to take a look at how your .replit file and port config are set. You can DM or book a quick check-in if you want a second pair of eyes on it. Hope it clears up soon!
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Wow, so this was exactly my issue. Canāt believe how much time it costs me when this kind of thing happens to someone with my strictly vibe-coder skill level. Solved it the hard way, in my other thread.
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Thank you for the reply, none of the those helped. I tried to book a chat but the link doesnāt seem to work.
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Ok, folks, now every app I have is not allowing preview. I have tried on the IOS app, with wifi, off wifi, every browser you can think of. I can view the direct URL but not the preview.
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Open shell and try command ākill 1ā - then close and re-open the application. What happens?
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Thanks, did not help!
Add me to your repl and Iāll take a look
@clickrun
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So mine suddenly came right, and I see a mail from Ryan at replit support: he changed my port from 3000 to 5000. Pretty much what @Hashlogics suggests above.
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@chrisbarker3 suggest heavily editing your .replit file output here, you included your object storage bucket ID.
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Cheers Mark 
Removed it.
I would start playing with them but when all 5 apps stop working and I was only actively working on 2, then I am going to let Replit fix this. It can not be my apps, the IOS app stopped working also.
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So Kody was able to login and they are all working nowā¦ He said they worked when he logged in. Heās a magic manā¦ Gotta Love Kody!
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Well the issue is back but only on 1 app and I have tried multiple paths to fix it including all of the comments here. It is stuck. Just when I think I am doneā¦
I spoke too soon, all my previews have stopped working again, even on IOS app none will work. I built a new app and it works just fine. Anymore hints would eb great.
Hey everyone, I am completely halted on any work as I work on this, Replit team, you guys got anything?
Want me to take a look? Add me to the repl @clickrun
Last time I had this issue, after hours of port switching, I found I literally just had to close the preview pane, then click on the screen icon button in the network tab.
Itās like the preview pane had gotten confused as to which source to display.
Itās simple and stupid, but worth trying if you havenāt already.
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