Hi, I have a problem with the Cosmos browser, when I click on the icon it doesn’t want to open in 3ds Max or in Vantage.
I can’t access to the library and it’s starting to impact my work.
I’ve tried many methods that I’ve found on youtube and on this forum…but none worked…
I have a different error in Max an in Vantage, as you can see in the captures bellow.
Please help 
Hey Julian,
From the provided screenshots it is obvious that Cosmos service is down. The reason for this could be in the log file. Could you please create a new ticket into our support portal, attaching C:\Program Files\Common Files\Chaos\Cosmos\cb.log? Alternatively, you can send it to me in a Direct Message (DM). Do not post it here, as it may contain sensitive data. If you decide to send it to me over DM, keep in mind that the forum won’t allow you to upload it as is – you have to rename the file extension to .txt first.
Hi Hristo,
I’ve looked in the file you mentioned and I think I found what’s wrong :
{“severity”:“error”,“time”:“2025-04-30T22:17:49.948+0200”,“message”:“couldn’t initialize cache”,“error”:“failed to execute migrations: Dirty database version 37. Fix and force version.(ERROR_CODE_DB_MIGRATION_FAILURE)(ERROR_CODE_DB_FILE_CORRUPT)”
Does it helps ?
If not I will send you the whole file but I don’t know how to send a DM to you, can you explain me how ?
Thank you
It looks like that you’re one of the affected users like those here. Follow the instructions in the other thread and you should be fine. Let us know if you’re not.
Problem solved !
Thank you !
Hi,
My issue has been back for quite sometime now but since I had a work around I didn’t post it here.
When I open Cosmos in 3dsmax I always have the error of connection, so I hit the windows key, search “cosmos” and launch “Stop chaos cosmos browser” then I do it again and this time “Start chaos cosmos browser” then I refresh the 3dsmax cosmos window and it work.
But sometimes I have error messages and difficulties to download and import models but it mostly works so that’s what I usually do.
Is there a way to fix it for good ?
Thank you
Hi, i just checked and yes it’s “ON”, I also checked all the boxes to authorize it in the firewall options but it still doesn’t launches correctly when I open it 
Have you noticed whether that happens right after Cosmos update or not?
Hi, to be honest I don’t remember, sorry. How can I update or reinstall it?
Hey, we released an update yesterday that fixes those “start after update” problems – 2026.03.25-649218
Once the update notification appears, please update to the new version (or it will update automatically, as long as Cosmos Browser is running in the background).
Hi, I opened 3dsmax and things weren’t working, so as usual I stopped/started cosmos browser to make it work. I then tried to update it but it failed so I downloaded the latest version online and now it seems to work !
Thank you !
Hm, what do you mean by “failed”? Was there an error and what? Or it was updating forever? Can you please send me in a Private Message recent installer_debug logs from C:\Windows\SystemTemp\ , if any?
