Exception: Git command failed to perform periodic pull: From github.com:NYRDS/wiki-data * branch master -> FETCH_HEAD error: cannot lock ref 'refs/remotes/origin/master': is at effd59370321a698446dc65681bfa0c6f6dfba77 but expected 561a1d9d54d63e9843bdb7c1fde3809e36c844d2 ! 561a1d9d..effd5937 master -> origin/master (unable to update local ref)

Exception: Git command failed to perform periodic pull: From github.com:NYRDS/wiki-data * branch master -> FETCH_HEAD error: cannot lock ref 'refs/remotes/origin/master': is at effd59370321a698446dc65681bfa0c6f6dfba77 but expected 561a1d9d54d63e9843bdb7c1fde3809e36c844d2 ! 561a1d9d..effd5937 master -> origin/master (unable to update local ref)

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.