2019-08-10 20:04:05 LOG_ERR: [gnusocial.club:queuedaemon.php:27064] claim of queue item id= 2575649 for transport pushin failed.
That pushin failed, fine... ;.) but should not that be more descriptive? Or line number there is just enough?
Does this error happen a lot? It simply means that there was an error updating the DB entry for a queue item, which should be rare but still shouldn't cause any further problems if it later succeeds.