bug 2247 fixed

lib/views/widgets/images/files_list.dart

@@ -42,6 +42,14 @@ class FilesList extends StatelessWidget {
               var isPdf = images[itemIndex].split(".").last.toLowerCase() == "pdf";
               var isExcel = images[itemIndex].split(".").last.toLowerCase() == "xlsx";
 
+              String checkNull(int index) {
+                try {
+                  return types[itemIndex];
+                } catch (ex) {
+                  return "Asset Guide";
+                }
+              }
+
               return Row(
                 spacing: 8,
                 children: [
@@ -81,7 +89,7 @@ class FilesList extends StatelessWidget {
                       2.height,
                       RichText(
                         text: TextSpan(
-                          text: '${types.isEmpty ? "Asset Guide" : types[itemIndex]} | ',
+                          text: '${types.isEmpty ? "Asset Guide" : checkNull(itemIndex)} | ',
                           style: AppTextStyles.tinyFont.copyWith(color: AppColor.lightTextColor(context)),
                           children: <TextSpan>[
                             TextSpan(