Git push hangs indefinitely, auth has succeeded

On a new Windows 10 machine (old hardware, fresh install from scratch) git push hangs forever after prompting for credential method. This happens whether using VS Code, Git Extensions or command line to commit.

git push --recurse-submodules=check --progress "origin" refs/heads/master:refs/heads/master

Up pops CredentialHelperSelector:
What do each of these selections mean? Why are the options shown twice?
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I accept the default of “manager-core”. A popup asking to use browser of sign-in or personal access token shows. I select browser.

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My browser opens a new tab with the message that authentication succeeded.

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…and nothing further occurs. I’ve waited 15 minutes like this.