Exception: Git command failed to perform periodic pull: ERROR: upstream connect error or disconnect/reset before headers. retried and the latest reset reason: remote connection failure, transport failure reason: delayed connect error: Connection refused fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.

An unforeseen error has occured. This is most likely a bug somewhere. It might be a problem in the gitbacked plugin.

More info has been written to the DokuWiki error log.