Create Repository Failed

I'm using SouceTree for Mac and since updating to v3 I am unable to create remote repositories. I receive this error: 

message: Not Found
https://developer.github.com/v3/repos/#create

Currently I have to manually create the repo in github and then set it up as the remote.

For reference, I am using the GitHub - OAuth - SSH method for my account and I am trying to create a private repo on a company account that I am admin of.

Again, this worked fine until I updated to v3 and nothing has changed in my system apart from that.