That will create a debug.log file in your /wp-content/ directory which you can examine in any text editor. Try going through the log-in sequence again and then inspect the log. If you don't find the debug.log file it means it didn't generate any warnings or errors.
I tested on my own local site and can confirm the problem.
I noticed the following PHP warnings in the debug.log:
[23-Mar-2020 12:53:25 UTC] PHP Notice: Undefined index: user_email in /OnTheGo/Sites/working/wp-content/plugins/miniorange-login-openid/class-mo-openid-login-widget.php on line 2065
[23-Mar-2020 12:53:25 UTC] PHP Notice: Undefined index: social_id in /Users/nigelanderson/OnTheGo/Sites/working/wp-content/plugins/miniorange-login-openid/class-mo-openid-login-widget.php on line 2066
[23-Mar-2020 12:53:25 UTC] PHP Notice: Undefined index: social_app_name in /Users/nigelanderson/OnTheGo/Sites/working/wp-content/plugins/miniorange-login-openid/class-mo-openid-login-widget.php on line 2067
I'm escalating this so that it can investigated further, and I'll let you know when there is some progress to report.
Actually, those PHP notices are generated with only the social login plugin activated, and no other plugins (including Toolset) active.
Those same PHP messages are shown when you log in to a site with just that plugin active.
We can't debug an issue with a broken plugin.
Please contact the plugin authors and ask them to fix the problem they have with their plugin.
When they have, if you still see a problem with the Toolset redirection, then you can open a new ticket (link to this one), and then we can investigate the issue.