diff --git a/src/commands/Article.ts b/src/commands/Article.ts
index f7a3633c..6a7f014f 100644
--- a/src/commands/Article.ts
+++ b/src/commands/Article.ts
@@ -239,13 +239,13 @@ export class Article {
   /**
    * Format the date to the defined format
    */
-  public static formatDate(dateValue: Date) {
+  public static formatDate(dateValue: Date): string {
     const dateFormat = Settings.get(SETTING_DATE_FORMAT) as string;
 
     if (dateFormat && typeof dateFormat === "string") {
       return format(dateValue, dateFormat);
     } else {
-      return typeof dateValue.toISOString === 'function' ? dateValue.toISOString() : dateValue;
+      return typeof dateValue.toISOString === 'function' ? dateValue.toISOString() : dateValue?.toString();
     }
   }
 
diff --git a/src/commands/Dashboard.ts b/src/commands/Dashboard.ts
index dc71b5aa..559a3cf8 100644
--- a/src/commands/Dashboard.ts
+++ b/src/commands/Dashboard.ts
@@ -458,7 +458,7 @@ export class Dashboard {
 
                 const contentType = ArticleHelper.getContentType(article.data);
                 const previewField = contentType.fields.find(field => field.isPreviewImage && field.type === "image")?.name || "preview";
-      
+
                 if (article?.data[previewField] && wsFolder) {
                   let fieldValue = article?.data[previewField];
                   if (fieldValue && Array.isArray(fieldValue)) {