diff --git a/lib/upload.php b/lib/upload.php
index 9a20ee8..3b60052 100644
--- a/lib/upload.php
+++ b/lib/upload.php
@@ -198,6 +198,8 @@ function fileExists(int $fileId, bool $onlyMine = true): bool|string
     if ($stmtfileexists->num_rows > 0) {
         return $filePath;
     } else {
+        echo $stmtfileexists->error;
+        echo $query;
         return false;
     }
 }