How to Upload Binaries using BuildPatchTool

Hi, new to all this, got so far as to get all my Id’s sorted, MyEpicSecret set, and when I attempt to upload I get a credentials error:(invalid_client_credentials), which I whole-heartedly believe they are not.

Now for the fun part! - When I click on any “private support” link on this site, I receive a 404 error and am redirected to the live community page.

epicgames.my.salesforce-sites.com/CommunitySSO/?code=4d44ccfb7eed407f8a15734aa58a11ce&state=devportal%7C%2Fs%2Fprivate-question-page

I would really like to get this sorted asap please, and thank you!