I have install it on a fresh Joomla, only install Jux Social Media with Breez3 Stzandard Template.
The same Error:
The URL mentioned is not blocked on the server side. It also comes up when the .htaccess file is renamed as a test http://test2020/modules/mod_jux_social_media/social/social.php to an error 500. Here is the error in the error log:
PHP Fatal error: Cannot declare class OAuthException, because the name is already in use in /www/htdocs/test/test2020/modules/mod_jux_social_media/social/social.php on line 875, referer: test2020/unternehmen/social-stream