Hi @dhasib!
By default we are using the wp-login.php page, which on your websites isn’t available, but on the first one it might be changed differently than on the second. So I think the problem will be given by that the wp-login.php was changed. When this happens, you should create an empty page, then at Global Settings -> General tab:
https://nextendweb.com/nextend-social-login-docs/global-settings/
you should use a “OAuth redirect uri proxy page” setting. In there you can change for our plugin, that not the wp-login.php page would be used for the API connection, but another page. At your API settings you made for Facebook:
https://nextendweb.com/nextend-social-login-docs/provider-facebook/#configuration
you have to change the step 11. setting, to change the url for the API. And you will also have to change the url at your Google API.
Then create a new page again, and also at the Global settings:
https://nextendweb.com/nextend-social-login-docs/global-settings/
you will find a “Page for register flow” setting. To the new page’s description you should add the given shortcode. Then select that page with our settings. This will change the registration and login url, which would be used to login your users.
If it still wouldn’t work out, let me know!
