If you receive this error when trying to install Time Doctor, attempt to manually create a folder inside your ~/Library/Application Support folder first.
If you aren’t allowed to do so, there’s probably an issue with your permissions.
To solve this, right-click on your Applications folder, select Get Info from the menu, and Allow read/write access for everyone.
The complete path for the cache should be ~/Library/Application Support/TimeDoctor.
If you’re still experiencing issues after following the instructions above, send an email to firstname.lastname@example.org.