I have these errors constantly. What are they telling me?
[10/25/18 10:59:44] http-tx-mgr.c(911): libcurl failed to PUT https://domain/seafhttp/repo/512ff274-786a-4755-ab00-adef6a4371ea/block/a757c857403fc6bbca10f604a68e6928edf426b4: Operation was aborted by an application callback.
[10/25/18 10:58:43] http-tx-mgr.c(3655): Failed to get file 545cdfed8f33424b1de4b257f4c2ca74042e6bc6 in repo 512ff274.
[10/25/18 10:58:43] http-tx-mgr.c(1186): Transfer repo '512ff274': ('normal', 'data') --> ('error', 'finished')
[10/25/18 10:58:43] sync-mgr.c(604): Repo 'pdf-files' sync state transition from uploading to 'error': 'Error occured in upload.'.