Matrix transport exception

exception.log

2018-11-27 11:32:41 [debug    ] JSONRPCClient created          [raiden.network.rpc.client] available_nonce=3 client=Parity-Ethereum//v2.1.6-stable-491f17f149-20181114/x86_64-linux-gnu/rustc1.30.1 node=9734bc77
Raiden is running in production mode

You are connected to the '17' network and the DB path is: /home/rakan/.raiden/node_9734bc77/netid_17/network_7098b039/v14_log.db
2018-11-27 11:32:41 [debug    ] Fetching available matrix servers [raiden.ui.app] available_servers=['https://raidentransport.exchangeunion.com', 'https://persephone.raidentransport.digitalvirtues.com', 'https://raidentransport.ki-decentralized.com', 'https://raidentransport.mycryptoapi.com']
2018-11-27 11:32:41 [debug    ] Restoring from snapshot        [raiden.storage.wal] from_state_change_id=1000 to_state_change_id=latest
2018-11-27 11:32:41 [debug    ] Replaying state changes        [raiden.storage.wal] num_state_changes=61
2018-11-27 11:32:41 [debug    ] Restored state from WAL        [raiden.raiden_service] last_restored_block=1374 node=9734bc77
2018-11-27 11:32:41 [debug    ] Alarm task first run           [raiden.tasks] known_block_number=1374 latest_block_hash=0x7d4726b4a5a488a97c4a60955d48acc04519b8f1d3f7bb2e06219d52439f36ac latest_block_number=1462 latest_gas_limit=8000000
2018-11-27 11:32:41 [debug    ] Received new block             [raiden.tasks] known_block_number=1374 latest_block_gas_limit=8000000 latest_block_hash=0x7d4726b4a5a488a97c4a60955d48acc04519b8f1d3f7bb2e06219d52439f36ac latest_block_number=1462 num_missed_blocks=87
2018-11-27 11:32:41 [debug    ] State change                   [raiden.raiden_service] node=9734bc77 state_change={"block_number": "1457", "gas_limit": 8000000, "block_hash": "0xaccc1dd2b8608492081d16d8929b40c999d73bb9e50ddcf42ed490d964f5fca0", "_type": "raiden.transfer.state_change.Block", "_version": 0}
2018-11-27 11:32:41 [debug    ] Processing pending transactions [raiden.raiden_service] node=9734bc77 num_pending_transactions=0
2018-11-27 11:32:42 [debug    ] Login                          [raiden.network.transport.matrix] homeserver=transport01.raiden.network server_url=https://transport01.raiden.network username=0x9734bc77a2717ac357d97401c99e4c14b87fa9d2
2018-11-27 11:32:42 [debug    ] Changing address presence state [raiden.network.transport.matrix] address=0xccaa48b8a965b31aaafe5463e6bdf1ae5f249c76 current_user=@0x9734bc77a2717ac357d97401c99e4c14b87fa9d2:transport01.raiden.network node=9734bc77 prev_state=None state=<UserPresence.UNAVAILABLE: 'unavailable'>
2018-11-27 11:32:42 [debug    ] State change                   [raiden.raiden_service] node=9734bc77 state_change={"node_address": "0xccAA48B8A965b31aAaFe5463E6BdF1ae5f249C76", "network_state": "reachable", "_type": "raiden.transfer.state_change.ActionChangeNodeNetworkState", "_version": 0}
2018-11-27 11:32:42 [debug    ] Changing address presence state [raiden.network.transport.matrix] address=0x3f0cb919344da6536faac3fa6e39af482670fbc6 current_user=@0x9734bc77a2717ac357d97401c99e4c14b87fa9d2:transport01.raiden.network node=9734bc77 prev_state=None state=<UserPresence.ONLINE: 'online'>
2018-11-27 11:32:42 [debug    ] State change                   [raiden.raiden_service] node=9734bc77 state_change={"node_address": "0x3f0Cb919344DA6536fAAC3fa6E39aF482670FbC6", "network_state": "reachable", "_type": "raiden.transfer.state_change.ActionChangeNodeNetworkState", "_version": 0}
2018-11-27 11:32:42 [debug    ] Inventory rooms                [raiden.network.transport.matrix] current_user=@0x9734bc77a2717ac357d97401c99e4c14b87fa9d2:transport01.raiden.network node=9734bc77 rooms={'!HOLinqOwSAmFEZmZlV:transport01.raiden.network': <Room id="!HOLinqOwSAmFEZmZlV:transport01.raiden.network" alias="#raiden_17_discovery:transport01.raiden.network">}
2018-11-27 11:32:42 [debug    ] Matrix started                 [raiden.network.transport.matrix] config={'available_servers': ['https://raidentransport.exchangeunion.com', 'https://persephone.raidentransport.digitalvirtues.com', 'https://raidentransport.ki-decentralized.com', 'https://raidentransport.mycryptoapi.com'], 'discovery_room': 'discovery', 'retries_before_backoff': 5, 'retry_interval': 5.0, 'server': 'https://transport01.raiden.network', 'private_rooms': True} current_user=@0x9734bc77a2717ac357d97401c99e4c14b87fa9d2:transport01.raiden.network node=9734bc77
2018-11-27 11:32:42 [debug    ] Alarm task started             [raiden.tasks] node=9734bc77
2018-11-27 11:32:42 [debug    ] Raiden Service started         [raiden.raiden_service] node=9734bc77
2018-11-27 11:32:42 [debug    ] REST API started               [raiden.api.rest] node=9734bc77
The Raiden API RPC server is now running at http://localhost:5502/.

See the Raiden documentation for all available endpoints at
http://raiden-network.readthedocs.io/en/stable/rest_api.html
Traceback (most recent call last):
  File "src/gevent/greenlet.py", line 716, in gevent._greenlet.Greenlet.run
  File "/home/rakan/Brainbot/raiden/raiden/network/transport/matrix.py", line 704, in join_room
    raise last_ex  # re-raise if couldn't succeed in retries
  File "/home/rakan/Brainbot/raiden/raiden/network/transport/matrix.py", line 698, in join_room
    room = self._client.join_room(room_id)
  File "/home/rakan/.pyenv/versions/3.6.5/envs/raiden/lib/python3.6/site-packages/matrix_client/client.py", line 320, in join_room
    response = self.api.join_room(room_id_or_alias)
  File "/home/rakan/.pyenv/versions/3.6.5/envs/raiden/lib/python3.6/site-packages/matrix_client/api.py", line 195, in join_room
    return self._send("POST", path)
  File "/home/rakan/.pyenv/versions/3.6.5/envs/raiden/lib/python3.6/site-packages/raiden_libs/network/matrix/client.py", line 75, in _send
    return super()._send(method, path, *args, **kwargs)
  File "/home/rakan/.pyenv/versions/3.6.5/envs/raiden/lib/python3.6/site-packages/matrix_client/api.py", line 691, in _send
    code=response.status_code, content=response.text
matrix_client.errors.MatrixRequestError: 404: {"errcode":"M_UNKNOWN","error":"No known servers"}
2018-11-27T11:32:42Z <Greenlet "Greenlet-4" at 0x7f1c30f1a448: join_room> failed with MatrixRequestError