explicitly cast int to string. i dont use python, sorry.

app.py

@@ -26,7 +26,7 @@ def duplicate(source_url, dst_repo, token, new_name, dst_repo_path, repo_type):
         login(token=token)
 
         # keep things separate, partly in case people download different files with same name (`download.zip`). Especially, it also allows saving filename to work
-        dir="/home/user/apps/downloads/"+int(time.time())+random.getrandbits(8)+"/"
+        dir="/home/user/apps/downloads/"+str(int(time.time()))+str(random.getrandbits(8))+"/"
         subprocess.check_call([r"mkdir","-p",dir])
         subprocess.check_call([r"aria2c","-x16","--split=16",source_url,"--dir="+dir])
         files=os.listdir(dir)