diff --git a/main.js b/main.js
index aa91f91b..5ca6968c 100644
--- a/main.js
+++ b/main.js
@@ -50223,12 +50223,15 @@ class BCPlugin extends obsidian.Plugin {
             debugGroupEnd(settings, "debugMode");
             return;
         }
-        const elForMaxWidth = mode === "preview"
+        const selectorForMaxWidth = mode === "preview"
             ? ".markdown-preview-view.is-readable-line-width .markdown-preview-sizer"
             : "";
-        const max_width = elForMaxWidth !== ""
-            ? getComputedStyle(document.querySelector(elForMaxWidth)).getPropertyValue("max-width")
+        const elForMaxWidth = selectorForMaxWidth !== ""
+            ? document.querySelector(selectorForMaxWidth)
             : null;
+        const max_width = elForMaxWidth
+            ? getComputedStyle(elForMaxWidth).getPropertyValue("max-width")
+            : "100%";
         const trailDiv = createDiv({
             cls: `BC-trail ${respectReadableLineLength
                 ? "is-readable-line-width markdown-preview-sizer markdown-preview-section"
diff --git a/src/main.ts b/src/main.ts
index 38cf2739..26ba9ffd 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1236,17 +1236,18 @@ export default class BCPlugin extends Plugin {
       return;
     }
 
-    const elForMaxWidth =
+    const selectorForMaxWidth =
       mode === "preview"
         ? ".markdown-preview-view.is-readable-line-width .markdown-preview-sizer"
         : "";
 
-    const max_width =
-      elForMaxWidth !== ""
-        ? getComputedStyle(
-            document.querySelector(elForMaxWidth)
-          ).getPropertyValue("max-width")
+    const elForMaxWidth =
+      selectorForMaxWidth !== ""
+        ? document.querySelector(selectorForMaxWidth)
         : null;
+    const max_width = elForMaxWidth
+      ? getComputedStyle(elForMaxWidth).getPropertyValue("max-width")
+      : "100%";
 
     const trailDiv = createDiv({
       cls: `BC-trail ${