As is usual with mysterious "permission denied" errors, SELinux was the underlying cause. ...
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as
ID Status Resolution Sev Product Comp Assignee Reporter Summary
40154 NEW --- min Sisyphus apt-indi zerg sem Нельзя выставить дату обновления системы более 3 недель

File a new bug in the "apt-indicator" component of the "Sisyphus" product