diff --git a/client/src/utils/file.ts b/client/src/utils/file.ts
index 57ee3dac356..32735e2800e 100644
--- a/client/src/utils/file.ts
+++ b/client/src/utils/file.ts
@@ -173,9 +173,16 @@ export const splitText2Chunks = ({ text, maxLen }: { text: string; maxLen: numbe
       chunks.push(chunk);
     }
 
-    const enc = getOpenAiEncMap();
-    const encodeText = enc.encode(chunks.join(''));
-    const tokens = encodeText.length;
+    const tokens = (() => {
+      try {
+        const enc = getOpenAiEncMap();
+        const encodeText = enc.encode(chunks.join(''));
+        const tokens = encodeText.length;
+        return tokens;
+      } catch (error) {
+        return chunks.join('').length;
+      }
+    })();
 
     return {
       chunks,
@@ -274,5 +281,6 @@ export const simpleText = (text: string) => {
   text = text.replace(/([\u4e00-\u9fa5])\s+([\u4e00-\u9fa5])/g, '$1$2');
   text = text.replace(/\n{2,}/g, '\n');
   text = text.replace(/\s{2,}/g, ' ');
+  text = text.replace(/[^\x00-\x7F]/g, ' ');
   return text;
 };