Update app.py

app.py

@@ -728,7 +728,7 @@ def make_crop_canvas_html(tab_idx):
   function getPtsTextbox() {{
     // Gradio hides the real <textarea> inside a wrapper.  Find by elem id.
     return document.getElementById(PTS_ID)?.querySelector("textarea")
-        || document.querySelector(`#${PTS_ID} textarea`);
+        || document.querySelector(`#${{PTS_ID}} textarea`);
   }}
 
   function writePts(pts_orig) {{