Twitter login not working

It does not seem related to our plugin. But we found following notice appearing after logging in second time:
Notice: Trying to get property of non-object in /var/www/miigle/wp-content/themes/sage/lib/models/user.php on line 153
It suggests that this might be due to something at the mentioned line of the file of your theme.

That notice has nothing to do with the problem. The page that you see is trying to load the current user, but the user is not logged in, so there’s nothing to show. You can also try going to /wp-login.php and /wp-admin. The Twitter login is not actually logging the user in.

Okay, we are looking into this. Bear with us.

Hey guys any updates on this?

We need to check logging in via Facebook at your website, but it seems your app is still in development mode. Would you go through the support documentation (https://support.heateor.com/how-to-get-facebook-app-id/), so that we can try logging in using Facebook?

Ah I see. It is now public

Users are not able to login using Twitter login because some plugin or custom functionality at your website is checking for some specific profile field which is mandatory at your website and cannot be fetched from user’s Twitter profile.
So, this seems something specific to your website. Nothing we can do about this.

Thank you for looking into it. I messed around with the server and it looks like the problem is with Varnish. Do you guys have any tips for working with Varnish? Or why it might work with Facebook but not Twitter?

Would you please provide some details about Varnish?