diff --git a/script.js b/script.js
index 9ef34bf..6aaae3a 100644
--- a/script.js
+++ b/script.js
@@ -36,7 +36,7 @@ async function apiCall(action, method = 'GET', body = null) {
     let data;
     try { data = JSON.parse(text); } catch (e) {
         console.error('API JSON parse error:', action, text.slice(0, 500));
-        throw new Error('Palvelin palautti virheellisen vastauksen');
+        throw new Error('API virhe (' + action + '): ' + text.slice(0, 300));
     }
     if (!res.ok) throw new Error(data.error || 'Virhe');
     return data;