[dokuwiki] sync error: Premature End of File(socket)

Hi, I am using the sync plugin, and face some problems. Now everytime when I
try to sync, it gives me the following error message

Failed to fetch remote file list. transport error - Premature End of File
(socket)


The problem begin to appear after I upgrade to Rincewind, but I am not sure
whether it's really related to Rincewind or a network problem.

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