diff --git a/apps/OpenSign/src/constant/Utils.js b/apps/OpenSign/src/constant/Utils.js
index 615ce9cf5..034b4b5d3 100644
--- a/apps/OpenSign/src/constant/Utils.js
+++ b/apps/OpenSign/src/constant/Utils.js
@@ -362,8 +362,7 @@ export async function getBase64FromUrl(url) {
     reader.readAsDataURL(blob);
     reader.onloadend = function () {
       const pdfBase = this.result;
-      const removeBase64Prefix = "data:application/octet-stream;base64,";
-      const suffixbase64 = pdfBase.replace(removeBase64Prefix, "");
+      const suffixbase64 = pdfBase.split(",").pop();
       resolve(suffixbase64);
     };
   });
diff --git a/apps/OpenSign/src/pages/GuestLogin.js b/apps/OpenSign/src/pages/GuestLogin.js
index 5b7d3e331..5ddf29b65 100644
--- a/apps/OpenSign/src/pages/GuestLogin.js
+++ b/apps/OpenSign/src/pages/GuestLogin.js
@@ -124,7 +124,7 @@ function GuestLogin() {
   };
 
   return (
-    <div style={{ padding: "2rem" }}>
+    <div style={{ padding: "2rem", background: "white" }}>
       {isLoading ? (
         <div
           style={{
diff --git a/apps/OpenSign/src/primitives/PdfDeclineModal.js b/apps/OpenSign/src/primitives/PdfDeclineModal.js
index a0439de9e..7de7f4b35 100644
--- a/apps/OpenSign/src/primitives/PdfDeclineModal.js
+++ b/apps/OpenSign/src/primitives/PdfDeclineModal.js
@@ -15,7 +15,7 @@ function CustomModal({
   return (
     show && (
       <div
-        className="bg-black bg-opacity-[75%] absolute z-[50] flex flex-col items-center justify-center"
+        className="bg-black bg-opacity-[75%] absolute z-[999] flex flex-col items-center justify-center"
         style={{
           width: containerWH && containerWH.width,
           height: isMobile ? "100%" : containerWH && containerWH.height