diff --git a/static/js/conversation.js b/static/js/conversation.js
index 1e36cd1..e6f1514 100644
--- a/static/js/conversation.js
+++ b/static/js/conversation.js
@@ -427,7 +427,7 @@ $('s-import-voices-file')?.addEventListener('change', async function () {
 
     try {
       const resp = await fetch('/api/conversation/turn', { method: 'POST', body: form });
-      if (!resp.ok) throw new Error('Server error ' + resp.status);
+      if (!resp.ok) { let _d=''; try { const _j=await resp.json(); _d=JSON.stringify(_j.detail||_j); } catch(_){} throw new Error('Server error ' + resp.status + (_d ? ': ' + _d : '')); }
       const reader = resp.body.getReader();
       const dec = new TextDecoder();
       let buf = '';
@@ -539,7 +539,7 @@ $('s-import-voices-file')?.addEventListener('change', async function () {
 
     try {
       const resp = await fetch('/api/conversation/turn', { method: 'POST', body: form });
-      if (!resp.ok) throw new Error('Server error ' + resp.status);
+      if (!resp.ok) { let _d=''; try { const _j=await resp.json(); _d=JSON.stringify(_j.detail||_j); } catch(_){} throw new Error('Server error ' + resp.status + (_d ? ': ' + _d : '')); }
       const reader = resp.body.getReader();
       const dec = new TextDecoder();
       let buf = '';