Hey,
We have managed to replicate the issue on our end.
When the js combinator is enabled, tho social login pup-up was opening a blank page instead of the login screen for the specific social network and an Uncaught reference error was appearing in the console.
We will fix the issue in the next version.
To fix the issue for your website you would have to add 'theChampSiteUrl'
to the excluded_inline_content using the sgo_javascript_combine_excluded_inline_content
filter
After adding this, click Purge SG Cache and the login pop-up should work fine and the error in the console should not be present anymore.
If you notice any other issues, feel free to reach back at us.
Regards,
Stanimir