Roblox users are reporting widespread login issues and receiving an "Unknown error occurred" message.

Fix CcmSetup Failed with Error Code 0x80004004, 0x80070643, 0x80070430, 0x87d00455, 0x80041013, 0x87d00227 by following the solutions mentioned here.

If Google Chrome failed to update with Error code 4: 0X80010108, check the GoogleUpdater folder and Google Update services.

Marvel Rivals Error code 4 Marvel Rivals error code 4 is listed as an 'unknown error' and almost nothing is known about it, fittingly.