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Just providing a table is not very useful.
The cancelled is fairly obvious, somebody using the system account cancelled the run.
NoSuchItem is not an issue, it is just telling you it tried to find something, e.g. a registry key value, but it did not exist.
Some of them may be because Discovery needs to use WMI but you only allow RemQuery. You have not provided enough details for specific cases. You need to look at individual scans. There may be associated ScriptFailures which gives you more details.