The following is the messages after I typed "passenger start". I didn't install naif, because I don't think I will need the illumination.
=============== Phusion Passenger Standalone web server started ===============
PID file: /home/jun/Downloads/lunaserv-3.20160316/passenger.3000.pid
Log file: /home/jun/Downloads/lunaserv-3.20160316/log/passenger.3000.log
Environment: development
You can stop Phusion Passenger Standalone by pressing Ctrl-C.
===============================================================================
App 15105 output: Error: The application encountered the following error: Could not find gem 'naif-spice' in any of the gem sources listed in your Gemfile. (Bundler::GemNotFound)
App 15105 output: /usr/lib/ruby/vendor_ruby/bundler/resolver.rb:289:in `block in verify_gemfile_dependencies_are_found!'
App 15105 output: /usr/lib/ruby/vendor_ruby/bundler/resolver.rb:257:in `each'
App 15105 output: /usr/lib/ruby/vendor_ruby/bundler/resolver.rb:257:in `verify_gemfile_dependencies_are_found!'
App 15105 output: /usr/lib/ruby/vendor_ruby/bundler/resolver.rb:48:in `start'
App 15105 output: /usr/lib/ruby/vendor_ruby/bundler/resolver.rb:22:in `resolve'
App 15105 output: /usr/lib/ruby/vendor_ruby/bundler/definition.rb:257:in `resolve'
App 15105 output: /usr/lib/ruby/vendor_ruby/bundler/definition.rb:170:in `specs'
App 15105 output: /usr/lib/ruby/vendor_ruby/bundler/definition.rb:237:in `specs_for'
App 15105 output: /usr/lib/ruby/vendor_ruby/bundler/definition.rb:226:in `requested_specs'
App 15105 output: /usr/lib/ruby/vendor_ruby/bundler/runtime.rb:108:in `block in definition_method'
App 15105 output: /usr/lib/ruby/vendor_ruby/bundler/runtime.rb:20:in `setup'
App 15105 output: /usr/lib/ruby/vendor_ruby/bundler.rb:107:in `setup'
App 15105 output: /usr/lib/ruby/vendor_ruby/bundler/setup.rb:20:in `<top (required)>'
App 15105 output: /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
App 15105 output: /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
App 15105 output: /var/lib/gems/2.5.0/gems/passenger-6.0.4/src/ruby_supportlib/phusion_passenger/loader_shared_helpers.rb:363:in `activate_gem'
App 15105 output: /var/lib/gems/2.5.0/gems/passenger-6.0.4/src/ruby_supportlib/phusion_passenger/loader_shared_helpers.rb:221:in `block in run_load_path_setup_code'
App 15105 output: /var/lib/gems/2.5.0/gems/passenger-6.0.4/src/ruby_supportlib/phusion_passenger/loader_shared_helpers.rb:527:in `running_bundler'
App 15105 output: /var/lib/gems/2.5.0/gems/passenger-6.0.4/src/ruby_supportlib/phusion_passenger/loader_shared_helpers.rb:220:in `run_load_path_setup_code'
App 15105 output: /var/lib/gems/2.5.0/gems/passenger-6.0.4/src/helper-scripts/rack-preloader.rb:91:in `preload_app'
App 15105 output: /var/lib/gems/2.5.0/gems/passenger-6.0.4/src/helper-scripts/rack-preloader.rb:189:in `block in <module:App>'
App 15105 output: /var/lib/gems/2.5.0/gems/passenger-6.0.4/src/ruby_supportlib/phusion_passenger/loader_shared_helpers.rb:380:in `run_block_and_record_step_progress'
App 15105 output: /var/lib/gems/2.5.0/gems/passenger-6.0.4/src/helper-scripts/rack-preloader.rb:188:in `<module:App>'
App 15105 output: /var/lib/gems/2.5.0/gems/passenger-6.0.4/src/helper-scripts/rack-preloader.rb:30:in `<module:PhusionPassenger>'
App 15105 output: /var/lib/gems/2.5.0/gems/passenger-6.0.4/src/helper-scripts/rack-preloader.rb:29:in `<main>'
[ E 2020-05-07 22:37:26.7811 15066/Tj age/Cor/App/Implementation.cpp:221 ]: Could not spawn process for application /home/jun/Downloads/lunaserv-3.20160316: The application encountered the following error: Could not find gem 'naif-spice' in any of the gem sources listed in your Gemfile. (Bundler::GemNotFound)
Error ID: 34284127
Error details saved to: /tmp/passenger-error-eykfMW.html
[ E 2020-05-07 22:37:26.7888 15066/T8 age/Cor/Con/CheckoutSession.cpp:276 ]: [Client 1-1] Cannot checkout session because a spawning error occurred. The identifier of the error is 34284127. Please see earlier logs for details about the error.
[ N 2020-05-07 22:37:29.2673 15066/T5 age/Cor/SecurityUpdateChecker.h:519 ]: Security update check: no update found (next check in 24 hours)