add debug logic

webui/app.py

@@ -2,6 +2,7 @@ import os
 import uuid
 from pathlib import Path
 
+import traceback
 from fastapi import FastAPI, Request, UploadFile, File, Form
 from fastapi.responses import HTMLResponse, JSONResponse
 from fastapi.staticfiles import StaticFiles
@@ -140,7 +141,13 @@ async def api_run(
             viz_mode=viz_mode,
         )
     except Exception as e:
-        return JSONResponse({"ok": False, "error": repr(e)}, status_code=500)
+        # return JSONResponse({"ok": False, "error": repr(e)}, status_code=500)
+        tb = traceback.format_exc()
+        print(tb)  # shows in HF logs
+        return JSONResponse(
+            {"ok": False, "error": str(e), "traceback": tb},
+            status_code=500
+        )
 
     # save results
     job_dir = RESULT_DIR / job_id

webui/static/main.js

@@ -142,7 +142,19 @@ form.addEventListener("submit", async (e) => {
 
   try {
     const resp = await fetch("/api/run", { method: "POST", body: fd });
-    const data = await resp.json();
+    // const data = await resp.json();
+    const text = await res.text();
+    let data;
+    try {
+      data = JSON.parse(text);
+    } catch (e) {
+      // Not JSON => show raw response
+      throw new Error(`Server returned non-JSON (${res.status}): ${text.slice(0, 300)}`);
+    }
+
+if (!res.ok || data.ok === false) {
+  throw new Error(data.error || `Request failed: ${res.status}`);
+}
 
     if (!resp.ok || !data.ok) {
       throw new Error(data?.error || `HTTP ${resp.status}`);