Error: No checker for twisted.cred.credentials.IAnonymous

[LarryE]

On:
evansl@lje-OptiPlex-9020:~/dwnlds/pybridge/launchpad/pybridge$ uname -a
Linux lje-OptiPlex-9020 4.4.0-98-generic #121-Ubuntu SMP Tue Oct 10 14:24:03 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

After starting the server, then the client, the connection to server
fails with error in Summary.

Here's output from terminal window:
--{--cut here--
evansl@lje-OptiPlex-9020:~/dwnlds/pybridge/launchpad/pybridge/bin$ ./pybridge&
[2] 5238
evansl@lje-OptiPlex-9020:~/dwnlds/pybridge/launchpad/pybridge/bin$ pythonpath= /home/evansl/dwnlds/pybridge/launchpad/pybridge
2017-11-19 03:42:44-0600 [-] Log opened.
2017-11-19 03:42:56-0600 [-] Starting factory <twisted.spread.pb.PBClientFactory instance at 0x7f2534018f38>
2017-11-19 03:42:56-0600 [Broker,0,127.0.0.1] Login failed for player1: User account does not exist on server
2017-11-19 03:42:56-0600 [Broker,0,127.0.0.1] Peer will receive following PB traceback:
2017-11-19 03:42:56-0600 [Broker,0,127.0.0.1] Unhandled Error
 Traceback (most recent call last):
 Failure: twisted.cred.error.UnauthorizedLogin: User account does not exist on server

2017-11-19 03:42:56-0600 [Broker,client] 'Error: User account does not exist on server'
2017-11-19 03:42:56-0600 [Broker,client] Lost connection to server
2017-11-19 03:42:56-0600 [-] Stopping factory <twisted.spread.pb.PBClientFactory instance at 0x7f2534018f38>
2017-11-19 03:43:07-0600 [-] Starting factory <twisted.spread.pb.PBClientFactory instance at 0x7f2534018f38>
2017-11-19 03:43:07-0600 [Broker,1,127.0.0.1] Peer will receive following PB traceback:
2017-11-19 03:43:07-0600 [Broker,1,127.0.0.1] Unhandled Error
 Traceback (most recent call last):
 Failure: twisted.cred.error.UnhandledCredentials: No checker for twisted.cred.credentials.IAnonymous

2017-11-19 03:43:07-0600 [Broker,client] 'Error: No checker for twisted.cred.credentials.IAnonymous'
2017-11-19 03:43:07-0600 [Broker,client] Lost connection to server
2017-11-19 03:43:07-0600 [-] Stopping factory <twisted.spread.pb.PBClientFactory instance at 0x7f2534018f38>

--}--cut here--

[LarryE (cppljevans)]

The problem disappears if, in pybridge/network/client.py in register function,
the assignment to anon is changed from:

  anon = credentials.Anonymous()

to:

  anon = credentials.UsernamePassword('', '')

which is apparently the way it is on the sourceforge repository.

HTH.