Fix conditinal fields for paragraphs

Closes #2902164

src/Controller/ConditionalFieldController.php

@@ -216,6 +216,19 @@ class ConditionalFieldController extends ControllerBase {
     return $this->formBuilder->getForm(ConditionalFieldFormTab::class, 'media', $media_type);
   }
 
+  /**
+   * Provide arguments for ConditionalFieldFormTab.
+   *
+   * @param string $paragraphs_type
+   *   Paragraphs type.
+   *
+   * @return array
+   *   Form array.
+   */
+  public function getParagraphEditFormTab($paragraphs_type) {
+    return $this->formBuilder->getForm(ConditionalFieldFormTab::class, 'paragraph', $paragraphs_type);
+  }
+
   /**
    * Provide arguments for ConditionalFieldFormTab.
    *