Record which client is running
Save the full message and the device it appears on. Check whether you are launching the application from the store or through the Roblox website: different installed copies should not be confused. Close all Roblox windows and launch the desired client again. After the update, check the same game and the same account. If an old copy is running, the result of updating another application will not solve the problem of the selected launch method.
Phone: update and time
Check the Roblox page in the official store of your device: App Store for iOS, Google Play for Android, Amazon Store for Fire OS. Complete the available update, close the application completely and restart your phone. The official guide also recommends checking the date and time. If the update doesn't help, there are reinstallation steps for each platform. Before deleting the application, make sure that you can log into your previous account.
Windows and Mac
On your computer, use the official client and the latest Roblox installation instructions. Help for 280 provides reinstallation to replace damaged data and get the latest version. On Mac, separately check the system permission to launch the application. The presence of old OS names in a bug article is not proof of their current support; Device requirements are checked separately. After reinstalling, repeat the original startup method and write down whether the message disappears.
If 280 remains
Compare the results on another available network and in another Roblox game. If the error persists after updating the client, please provide support with the device, OS, installation method, text 280 and the steps completed. When contacting, separate the update error from the situation when the site is open, but the application does not start at all. Additional actions with local data are available in the official section of your platform; do not follow the instructions for another OS if the error number matches.
Sources and checks
Guides are automatically translated from Russian; interface labels may differ. The Russian edition is the original.