Fix html escape with None

app_debug.py

@@ -60,7 +60,10 @@ def get_jobs_info_in_queue():
 
 def get_queue_status():
     if len(pipe.jobs) > 0 or pipe.current is not None:
-        return f'<div style="padding-top: 5%">Current job: {html.escape(pipe.current)} <br/> Jobs in queue: <br/> {"".join(get_jobs_info_in_queue())}</div>'
+        current = pipe.current
+        if current is None:
+            current = "None"
+        return f'<div style="padding-top: 5%">Current job: {html.escape(current)} <br/> Jobs in queue: <br/> {"".join(get_jobs_info_in_queue())}</div>'
     else:
         return '<div style="padding-top: 5%">No jobs in queue, please submit an evaluation task from another tab.</div>'