When I used bigwigAverage, I faced this following error. Does anyone has solution for this? Thanks.

bigwigAverage -b a1.bw a2.bw -o a3.bw
Preloading the following deepBlue files: a1.bw,a2.bw
Traceback (most recent call last):
  File "/Users/miniconda3/bin/bigwigAverage", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/Users/miniconda3/lib/python3.11/site-packages/deeptools/bigwigAverage.py", line 129, in main
    foo = db.deepBlue(deepBlueFiles[0][0], url=args.deepBlueURL, userKey=args.userKey)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/miniconda3/lib/python3.11/site-packages/deeptools/deepBlue.py", line 138, in __init__
    experimentID = self.getEID()
                   ^^^^^^^^^^^^^
  File "/Users/miniconda3/lib/python3.11/site-packages/deeptools/deepBlue.py", line 164, in getEID
    (status, resps) = self.server.search(self.sample, "experiments", self.userKey)
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/miniconda3/lib/python3.11/xmlrpc/client.py", line 1122, in __call__
    return self.__send(self.__name, args)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/miniconda3/lib/python3.11/xmlrpc/client.py", line 1464, in __request
    response = self.__transport.request(
               ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/miniconda3/lib/python3.11/xmlrpc/client.py", line 1166, in request
    return self.single_request(host, handler, request_body, verbose)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/miniconda3/lib/python3.11/xmlrpc/client.py", line 1196, in single_request
    raise ProtocolError(
xmlrpc.client.ProtocolError: <ProtocolError for deepblue.mpi-inf.mpg.de/xmlrpc: 502 Proxy Error>