Fatal error: Declaration of APP\plugins\generic\plumAnalytics\PlumAnalyticsBlockPlugin::getBlockTemplateFilename() must be compatible with PKP\plugins\BlockPlugin::getBlockTemplateFilename(): string in /var/www/vhosts/revistavegueta.ulpgc.es/httpdocs/ojs/plugins/generic/plumAnalytics/PlumAnalyticsBlockPlugin.php on line 108