fix function call

app.py

@@ -229,7 +229,7 @@ def run_pipeline(fileobj, layer_choice, var_choice, obs_choice, batch_size=64):
 
     # compute UMAP
     color_series = adata.obs[obs_choice] if (obs_choice and obs_choice in adata.obs) else None
-    coords = _compute_umap_from_emb(E, color_series)
+    coords = _compute_umap_from_emb(E)
 
     # plot UMAP
     import matplotlib.pyplot as plt