Hi @jenish11
Nextend Social Login handles the login on the /wp-login.php. If this page is not available, you need to set up a “OAuth redirect uri proxy page” which you can do at Global settings > General: https://nextendweb.com/nextend-social-login-docs/global-settings/
Simply create a new page (what you won’t be using for anything else) and select it to be the “OAuth redirect uri proxy page”.
Also please note that your ListingPro theme does a custom integration with Nextend Social Login, and the buttons on their forms are not created by us but their custom codes. This means that the /wp-login.php is hardcoded in their login URLs, and from our end it can’t be changed. Because of that the “OAuth redirect uri proxy page” won’t work on the buttons what they create (their buttons appear e.g. on your login popup).
In order for the “OAuth redirect uri proxy page” feature to work, you’ll either need to replace the login URLs (so change the /wp-login.php to the new page’s URL), or replace their buttons to ours, what you can do like this: https://nextendweb.com/nextend-social-login-docs/listingpro-replacing-social-buttons/