Hey Stefano,
I am really sorry for the delay of this reply. This issue has nothing to do with EasyBlog. It is caused by your system plugin "IWT Opengraph Articles".
The plugin should never rely on the document without checking the document mode on the page. I have modified the file /plugins/system/iwt_opengraph_articles/iwt_opengraph_articles.php at line 93 by adding the block of codes below to fix this:
if ($document->getType() != 'html') {
return;
}
Error generated by the plugin:
Fatal error: Call to undefined method JDocumentRaw::addCustomTag() in /var/www/vhosts/stefanorigazio.it/sviluppo.stefanorigazio.it/plugins/system/iwt_opengraph_articles/iwt_opengraph_articles.php on line 94