Hi @chengjianping
By “Google’s IPA” do you actually mean a Google App?
If you do, then each plugin uses its own endpoint and its own configuration, so although you created an App, that doesn’t guarantee that you configured it properly for Nextend Social Login.
So in the first place I would suggest you to go through the steps of our Google provider in its Getting Started section, and make sure you did everything that we described there, as the “Access blocked: This app’s request is invalid – Error 400: redirect_uri_mismatch” error:
typically occurs if you skipped some of our steps, more specifically you didn’t add the redirect url that we suggested in the Getting Started guide, like we mention here:
Once it is done, the verification should be successful and you could enable the Google provider. Once the provider is enabled the Google button should appear in your WordPress default login form ( /wp-login.php ).
Note: As I see you use WooCommerce. In the forms of WooCommerce the social buttons won’t appear automatically, unless you
Best regards,
Laszlo.