dokuwiki\Exception\FatalException: Cannot redeclare class syntax_plugin_zotero (previously declared in /var/www/alternc/e/educode/www/educode.be/dokuwiki/lib/plugins/master/syntax.php:27)

An unforeseen error has occured. This is most likely a bug somewhere. It might be a problem in the master plugin.

More info has been written to the DokuWiki error log.