Fix: Unable to start the Phusion Passenger watchdog
⏱ around 4 minutes read time
[error] *** Passenger could not be initialized because of this error: Unable to start the Phusion Passenger watchdog (/usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.52/buildout/agents/PassengerWatchdog): Permission denied (errno=13)