Enable MultiTenancy, create tenant domain, login as admin@domain.
Create Site "First", create Site "Second".
Upload file "1.txt" at site "First". Run action "Move" file "1.txt" to "Second" site.
Result: file successfully moved, but error message "The move could not be completed" is displayed.
It fails at SitesPermissionCleaner.cleanSitePermissions() at line 100 [NullPointerException].
The same error happens when moving file inside some site folders and from repository to site.