You removed Slogin component is not removed plugins. Plugins cause the component features that you have already removed. If you can not go to the admin panel components, connect via FTP delete a folder on your website /plugins/user/slogin.
Typically they close the ability to access social networks and, most importantly, they close the ability to access the server for social networks.
The social network, in other words, turns to Slogin...
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