{JFBCLogin}
If you set Error Reporting to 'Maximum' in the Joomla Global Configuration area, that should show the actual error message for why that crashed the site. My guess though is that you put the {JFBCLogin} tag inside a PHP block of code. It should not go inside a PHP block but inside a normal HTML area where something might normally be displayed directly to the user.I then added {JFBCLogin} to mod_socialloginandsocialshare (LoginRadius) but that crashed the site
<a id="sc_fblogin" href="javascript:void(0)" onclick="jfbc.login.provider('facebook');">
<img src="/media/sourcecoast/images/provider/facebook/icon_label.png" alt="Login With Facebook" title="Login With Facebook"/></a>
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