This post was made for those who are suffering from error 280, I’ll Include some steps that solved the problem for me. Please give a 
if this helps you
- Works on W7 and W10
Post can be found in Roblox support, I’m only posting it here if anyone searches for this bug on Devforum.
1 Step - Correct your System’s Time & Date
Usually this error happens when the date or time of our device is incorrect, correcting it will prevent this error from happening in the future.
- Search Settings in your Search Bar.
- Open Settings .
- Find Time & Language.
- Open Date & Time.
- Select your correct Time zone.
- Click on Save .
Step 2 - Fixing the error
The following steps only fix the error, do not prevent the error from happening, Do Step 1 before doing theses steps.
-
Search Control Panel on the Search Bar or use a shortcut, Windows Logo Key + R and write control panel
-
Once you open control panel, click on View By and choose Large Icons
Fact: You can adjust your device time and date through control panel
- After doing this step, Click on the button Internet Options, Once you click the button, a new screen will pop-up
- Click on Advanced and then Reset Button
- A screen will pop-up again, click on Delete Personal Settings and later on Reset, Now open Roblox Launcher and it will update. (If you open Roblox Launcher and it do not update, try restarting your computer)
