Getting errors when trying to include Discord's GameSDK

Not sure if this is the right place, but anyways:

I’m trying to include Discord’s GameSDK whilst following the tutorial on their website (…-starter-guide), but i’m getting a few errors.
The errors i’m getting are 6x the same error: unresolved external symbol.

For more information see the included screenshots.

How can i fix these errors?
Thanks in advance!