"ERROR (invalid-token): Invalid token." after seemingly successful login via GitHub

[TidbitSoftware]

WordPress version: 6.9.4
PHP version: 8.3.30
Plugin version: 3.11.3
IDP type : GitHub

I am running the plugin on a local development installation of WordPress (MAMP, custom vhost). I've use the following values for setting up the plugin to use GitHub as an IDP,

OpenID Scope: openid
Login Endpoint URL: https://github.com/login/oauth/authorize
Userinfo Endpoint URL: https://api.github.com/user
Token Validation Endpoint URL: https://github.com/login/oauth/access_token
JWKS URI: https://github.com/login/oauth/.well-known/jwks
Enable Refresh Token: checked
Disable SSL Verify: checked
Allow Internal IDP: checked
Redirect Back to Origin Page: checked

I know the Client ID and Client Secret Key is set correctly because I get directed to GitHub and presented with the option to authorize. Then I am redirected successfully to WordPress. However, I get "ERROR (invalid-token): Invalid token." printed to the front-end screen. In the plugin settings page, the messages are not much more helpful. Example:

Type make_authentication_url
URI : /wp-login.php?login-error=invalid-token&message=Invalid+token.

https://github.com/login/oauth/authorize?response_type=code&scope=openid&client_id=Ov23lizbKNqS3UE9uM0a&state=2e35e330225129bd593eb8a5ac5b51e5&redirect_uri=http%3A%2F%2Fghub-wp.local%2Fwp-admin%2Fadmin-ajax.php%3Faction%3Dopenid-connect-authorize

Type invalid-token
URI : /wp-admin/admin-ajax.php?action=openid-connect-authorize&code=&state=bac53761774350de40745d20623c9f3e

Invalid token.

Type request_authentication_token
URI : /wp-admin/admin-ajax.php?action=openid-connect-authorize&code=&state=bac53761774350de40745d20623c9f3e

https://github.com/login/oauth/access_token

Type ssl-bypass-warning
URI : /wp-admin/admin-ajax.php?action=openid-connect-authorize&code=&state=bac53761774350de40745d20623c9f3e

SSL verification disabled - ONLY for development. NEVER use in production!

I'm not sure what I'm missing here. I would otherwise suspect it has to do with it being in a local environment, or that I'm using a vhost (localhost -> my-site.local) but all redirects otherwise seem to be working correctly.

Any insights from the developers or community who have also gotten this working with GitHub and/or a local environment would be greatly appreciated.