Guard env parsing against missing str_starts_with

app/Core/Config.php

@@ -60,7 +60,8 @@ class Config
         }
 
         foreach ($lines as $line) {
-            if (str_starts_with(trim($line), '#')) {
+            $trimmed = trim($line);
+            if ($trimmed === '' || $trimmed[0] === '#') {
                 continue;
             }