diff --git a/simple-mind-map/src/Export.js b/simple-mind-map/src/Export.js
index ec5302ae..0f890fbd 100644
--- a/simple-mind-map/src/Export.js
+++ b/simple-mind-map/src/Export.js
@@ -41,8 +41,10 @@ class Export {
     let nodeWithDomToImg = null
     if (domToImage && this.mindMap.richText) {
       let res = await this.mindMap.richText.handleSvgDomElements(svg)
-      nodeWithDomToImg = res.svg
-      svgHTML = res.svgHTML
+      if (res) {
+        nodeWithDomToImg = res.svg
+        svgHTML = res.svgHTML
+      }
     }
     return {
       node: svg,
diff --git a/simple-mind-map/src/RichText.js b/simple-mind-map/src/RichText.js
index eb15009f..e570cf49 100644
--- a/simple-mind-map/src/RichText.js
+++ b/simple-mind-map/src/RichText.js
@@ -416,7 +416,11 @@ class RichText {
           reject(error)
         }
       }
-      if (len > 0) transform()
+      if (len > 0) {
+        transform()
+      } else {
+        resolve(null)
+      }
     })
   }