If you see any of the error codes listed below, upload your QB to GoFile or LimeWire.

Error code: 21076

Error code: 25234

Error code: 17685

Error code: 37713

Error code: 48525

Error code: 91341

Error code: 25135

You can find your QB there (press Windows+R on your keyboard and paste the path): %localappdata%/Ubisoft/r6s

Upload the RainbowSix.exe and then share the link with support.