Error when creating App Packages

Question

Does anybody understand what the following paragraph is trying to say?

What do I have to do to get rid of this error so that I can submit my app on Windows Store?

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Answer 1

had had the same problem. The owner of the file SupportedAPIs-x64.xml had been set to none, so I changed it to the SYSTEM. Also under Permissions there had been a line SYSTEM and other columns for this principal had been empty. There were another principal SYSTEM and its other columns were ok. So I deleted the first SYSTEM principal and everything was OK. Just open properties of that file and under Security click on Advanced button. Basically I compared permissions of the file with permissions of the SupportedAPIs-x86.xml. Try to open the file in notepad, if it works.