diff --git a/src/MarkdownPostProcessor.ts b/src/MarkdownPostProcessor.ts
index f81c5e8..92e0525 100644
--- a/src/MarkdownPostProcessor.ts
+++ b/src/MarkdownPostProcessor.ts
@@ -129,7 +129,7 @@ const setStyle = ({element,imgAttributes,onCanvas}:{
     element.addClass("excalidraw-embedded-img");
   }
   if(
-    window.ExcalidrawAutomate.plugin.settings.canvasImmersiveEmbed &&
+    window?.ExcalidrawAutomate?.plugin?.settings?.canvasImmersiveEmbed &&
     !element.hasClass("excalidraw-canvas-immersive")
   ) {
     element.addClass("excalidraw-canvas-immersive");
@@ -413,7 +413,7 @@ const createImgElement = async (
     if(imgOrDiv.hasClass(cssClass)) return;
     imgOrDiv.addClass(cssClass);
   });
-  if(window.ExcalidrawAutomate.plugin.settings.canvasImmersiveEmbed) {
+  if(window?.ExcalidrawAutomate?.plugin?.settings?.canvasImmersiveEmbed) {
     if(!imgOrDiv.hasClass("excalidraw-canvas-immersive")) {
       imgOrDiv.addClass("excalidraw-canvas-immersive");
     }
diff --git a/src/utils/ObsidianUtils.ts b/src/utils/ObsidianUtils.ts
index fc65e4e..b2290b5 100644
--- a/src/utils/ObsidianUtils.ts
+++ b/src/utils/ObsidianUtils.ts
@@ -244,7 +244,8 @@ export const getFileCSSClasses = (
   file: TFile,
 ): string[] => {
   if (file) {
-    const plugin = window.ExcalidrawAutomate.plugin;
+    const plugin = window?.ExcalidrawAutomate?.plugin;
+    if(!plugin) return [];
     const fileCache = plugin.app.metadataCache.getFileCache(file);
     if(!fileCache?.frontmatter) return [];
     const x = parseFrontMatterEntry(fileCache.frontmatter, "cssclasses");