Sign in with a link

Use this if the normal sign-in ends at SWCombine with invalid_client.

In this same browser, open swcombine.com and make sure you are logged in.
Copy the link below, paste it into the address bar of that SWCombine tab, and go.
Approve the request. SWCombine sends you back here, signed in.

Authorization link (valid for ten minutes, this browser only)

Or open it directly if you are sure you are logged in to SWCombine here.