updated to work with Seboettg citeproc

src/Plugin/BibCiteProcessor/CiteprocPhpInline.php

@@ -2,7 +2,8 @@
 
 namespace Drupal\bibcite_footnotes\Plugin\BibCiteProcessor;
 
-use AcademicPuma\CiteProc\CiteProc;
+//use AcademicPuma\CiteProc\CiteProc;
+use Seboettg\CiteProc\CiteProc;
 use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\bibcite\Plugin\BibCiteProcessorBase;
@@ -66,8 +67,10 @@ class CiteprocPhpInline extends BibCiteProcessorBase implements BibCiteProcessor
     if (!$data instanceof \stdClass) {
       $data = json_decode(json_encode($data));
     }
-
-    return $cite_proc->render($data, $mode);
+    if (!empty($data)) {
+      return $cite_proc->render($data, $mode);
+    }
+    return '';
   }
 
 }