localhost refused to connect.

[nicolas_pillard1]

Hi, Since yesterday, impossible to reach Chaos Cosmos Internet connection is ok. Correctly logged with my Chaos licence. Could you tell me what's wrong?
Problem with Cinema4D / Vray
Thx for the help

This site can’t be reached

localhost refused to connect.

[hristo_chakarov]

Hello,

Thank you for escalating this. We are aware of the problem and just released a fix. Unfortunately, it won’t automatically solve your problem.

To solve your problem:

1. Stop Cosmos Browser from the Start Menu shortcut
2. Delete all files inside %LOCALAPPDATA%\Chaos\Cosmos\DB
3. Start Cosmos Browser from the Start Menu shortcut

Let us know if you need further assistance.

[nicolas_pillard1]

Cosmos is back... Thx a lot fot the help...

[brian_albin]

Hello,

Thank you for escalating this. We are aware of the problem and just released a fix. Unfortunately, it won’t automatically solve your problem.

To solve your problem:

1. Stop Cosmos Browser from the Start Menu shortcut
2. Delete all files inside %LOCALAPPDATA%\Chaos\Cosmos\DB
3. Start Cosmos Browser from the Start Menu shortcut

Let us know if you need further assistance.

I'm running into the same issue right now. I've tried the steps you provided with no luck. Running on 3ds Max 2025 // V-Ray 7 Hotfix 1.

[hristo_chakarov]

brian_albin I've sent you a PM

[joie_puckett]

1. Stop Cosmos Browser from the Start Menu shortcut
2. Delete all files inside %LOCALAPPDATA%\Chaos\Cosmos\DB
3. Start Cosmos Browser from the Start Menu shortcut

I had this problem with Rhino V-Ray on Windows 11, and this solution worked. Stopping Cosmos Browser with Admininstrator and deleting the 4 files worked.

[brian_knapp]

%LOCALAPPDATA%\Chaos\Cosmos\DB just does not exisit on my comp, I have tried reinstalling, deleting anything to do with chaos cosmos, and still nothing. Absolutly dumb, I haven't been able to access the browser for 2 days. why.......what did you do?

[brian_knapp]

This actually fixed whatever broken nonsense they did to the browser if you still can't connect to the local host and can't find whatever %LOCALAPPDATA%\Chaos\Cosmos\DB is.

Regarding to Alexander Milanov´s conversation by a Ticket request, I felt I should give the Info to the Forum as well, because this one solved it:

1. Uninstall Chaos Cosmos (from Control panel -> Programs and features).
2. Open C:\Program Files\Common Files\ChaosGroup and delete the ChaosCosmos folder if it is present.
3. Open C:\Users\YourUsername\Documents\ and delete the ChaosCosmos folder if it is present. (... and I only missed this one.. )
4. Download and install Chaos Cosmos from the following link: https://download.chaos.com/downloads...208240672-free

& ... Works!

[hristo_chakarov]

brian_knapp: First of all, apologies for the hard times that you had. It isn't "nonsence", sometimes nasty bugs manage to sneak in, unfortunately.

%LOCALAPPDATA%\Chaos\Cosmos\DB is a valid Windows path if you copy-paste it inside the address bar of the File Explorer:

https://youtu.be/c1AQPnmOIkA

Also, step 3 is not needed, on the contrary – this will remove all downloaded assets.