Traceback (most recent call last):


 "src/gevent/greenlet.py", line 854, in gevent._gevent_cgreenlet.Greenlet.run


 "/home/ozzie/Entwicklung/calibre-web-test/venv/lib/python3.8/site-packages/gevent/baseserver.py", line 34, in _handle_and_close_when_done

return handle(*args_tuple)


 "/home/ozzie/Entwicklung/calibre-web-test/venv/lib/python3.8/site-packages/gevent/server.py", line 233, in wrap_socket_and_handle

with _closing_socket(self.wrap_socket(client_socket, **self.ssl_args)) as ssl_socket:


 "/home/ozzie/Entwicklung/calibre-web-test/venv/lib/python3.8/site-packages/gevent/_ssl3.py", line 797, in wrap_socket

return SSLSocket(sock=sock, keyfile=keyfile, certfile=certfile,


 "/home/ozzie/Entwicklung/calibre-web-test/venv/lib/python3.8/site-packages/gevent/_ssl3.py", line 312, in __init__

raise x


 "/home/ozzie/Entwicklung/calibre-web-test/venv/lib/python3.8/site-packages/gevent/_ssl3.py", line 308, in __init__

self.do_handshake()


 "/home/ozzie/Entwicklung/calibre-web-test/venv/lib/python3.8/site-packages/gevent/_ssl3.py", line 667, in do_handshake

self._sslobj.do_handshake()
ssl.SSLError: [SSL: SSLV3_ALERT_CERTIFICATE_UNKNOWN] sslv3 alert certificate unknown (_ssl.c:1108)

Traceback (most recent call last):

 "<stdin>", line 1, in <module>

 "sympy/matrices/immutable.py", line 40, in __new__
return cls._new(*args, **kwargs)

 "sympy/matrices/immutable.py", line 33, in _new
*args, **kwargs)

 "sympy/matrices/matrices.py", line 137, in _handle_creation_inputs
return args[0].rows, args[0].cols, args[0].as_explicit()._mat

 "sympy/matrices/expressions/matexpr.py", line 199, in as_explicit
for i in range(self.rows)])

 "sympy/matrices/expressions/matexpr.py", line 168, in __getitem__
return self._entry(i, j)

 "sympy/matrices/expressions/matpow.py", line 36, in _entry
*[self.base for k in range(self.exp)])._entry(i, j)

 "sympy/matrices/expressions/matmul.py", line 51, in _entry
if X.shape[1].is_Number:AttributeError: 'int' object has no attribute 'is_Number'