It seems like you are using two modules of social login and both are conflicting with each other.
Our Social Login module provides -
- Social login with Facebook, Google, Twitter and LinkedIn.
-Social Login available on both Register page and Login page.
Also, it is available for vendors. You can follow the below link for Vendor Social Login
https://cedcommerce.com/magento-extensions/marketplace/vendor-social-login-addon
So, if your requirements are fulfilled with our extension, you can disable the third party module and can use social login features smoothly.