diff --git a/frontends/web/src/new_front/pages/Submissions/SubmitPrediction.tsx b/frontends/web/src/new_front/pages/Submissions/SubmitPrediction.tsx
index 135cee04c..b75c203d9 100644
--- a/frontends/web/src/new_front/pages/Submissions/SubmitPrediction.tsx
+++ b/frontends/web/src/new_front/pages/Submissions/SubmitPrediction.tsx
@@ -44,7 +44,7 @@ const SubmitPrediction = () => {
     const formData = new FormData();
     const predictions = modelData.file[0];
     const predictionsFormat = predictions.name.split(".").pop().toLowerCase();
-    if (predictionsFormat !== "json" && predictionsFormat !== "jsonl") {
+    if (predictionsFormat !== "json" || predictionsFormat !== "jsonl") {
       Swal.fire({
         title: "Error!",
         text: "Please, upload a json file.",
@@ -81,7 +81,7 @@ const SubmitPrediction = () => {
         if (error.response.status === 400) {
           Swal.fire({
             title: "Error!",
-            text: "Please, upload a valid file.",
+            text: "Although uploaded, the submission failed to evaluate.",
             icon: "error",
             confirmButtonText: "Ok",
           }).then(() => {