diff --git a/tinygrad/viz/js/index.js b/tinygrad/viz/js/index.js
index dabedcf638..39aa6136f9 100644
--- a/tinygrad/viz/js/index.js
+++ b/tinygrad/viz/js/index.js
@@ -185,7 +185,7 @@ function renderMemoryGraph(graph) {
     return `${p0.join(' ')} ${p1.join(' ')}`;
   }).attr("fill", d => `#${colors[d.buf.num % colors.length]}`).on("mouseover", (e, { id, buf, x }) => {
     d3.select(e.currentTarget).attr("stroke", "rgba(26, 27, 38, 0.8)").attr("stroke-width", 0.8);
-    const metadata = document.querySelector(".container.metadata");
+    const metadata = document.querySelector(".metadata");
     document.getElementById("current-buf")?.remove();
     const { num, dtype, nbytes, ...rest } = buf;
     let label = `<BUFFER n${num} ${dtype} ${nbytes_format(nbytes)}>\nalive for ${pluralize(x[x.length-1]-x[0], 'timestep')}`;
diff --git a/tinygrad/viz/serve.py b/tinygrad/viz/serve.py
index 99c9c4f502..62b0a2fb20 100755
--- a/tinygrad/viz/serve.py
+++ b/tinygrad/viz/serve.py
@@ -20,8 +20,9 @@ uops_colors = {Ops.LOAD: "#ffc0c0", Ops.STORE: "#87CEEB", Ops.CONST: "#e0e0e0",
 
 # NOTE: if any extra rendering in VIZ fails, we don't crash
 def pcall(fxn:Callable[..., str], *args, **kwargs) -> str:
+  err = kwargs.pop("err", "")
   try: return fxn(*args, **kwargs)
-  except Exception: return f"ERROR in {fxn.__name__}\n{kwargs.get('err', '')}"
+  except Exception: return f"ERROR in {fxn.__name__}\n{err}"
 
 # ** Metadata for a track_rewrites scope