Error when starting up my rails server : 767: unexpected token at '' (JSON::ParserError)

Somewhere in my code an error now exists and I cant boot my server properly. Please help

DEPRECATION WARNING: Single arity template handlers are deprecated. Template handlers must now accept two parameters, the view object and the source for the view object. Change:

Coffee::Rails::TemplateHandler.call(template) To: Coffee::Rails::TemplateHandler.call(template, source) (called from at C:/Users/User/Desktop/RubyTutorials/testdev/config/application.rb:9) => Booting Puma => Rails 6.0.0 application starting in development => Run rails server --help for more startup options Exiting Traceback (most recent call last): 46: from bin/rails:4:in <main>' 45: from bin/rails:4:inrequire' 44: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands.rb:18:in <top (required)>' 43: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command.rb:46:ininvoke' 42: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command/base.rb:65:in perform' 41: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/thor.rb:387:indispatch' 40: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/thor/invocation.rb:126:in invoke_command' 39: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/thor/command.rb:27:inrun' 38: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands/server/server_command.rb:138:in perform' 37: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands/server/server_command.rb:138:intap' 36: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands/server/server_command.rb:147:in block in perform' 35: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands/server/server_command.rb:37:instart' 34: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands/server/server_command.rb:77:in log_to_stdout' 33: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/rack/server.rb:354:inwrapped_app' 32: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/rack/server.rb:219:in app' 31: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/rack/server.rb:319:inbuild_app_and_options_from_config' 30: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/rack/builder.rb:40:in parse_file' 29: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/rack/builder.rb:49:innew_from_string' 28: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/rack/builder.rb:49:in eval' 27: from config.ru:in' 26: from config.ru:in new' 25: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/rack/builder.rb:55:ininitialize' 24: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/rack/builder.rb:55:in instance_eval' 23: from config.ru:3:inblock in ' 22: from config.ru:3:in require_relative' 21: from C:/Users/User/Desktop/RubyTutorials/testdev/config/environment.rb:5:in' 20: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/application.rb:363:in initialize!' 19: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/initializable.rb:60:inrun_initializers' 18: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/2.6.0/tsort.rb:205:in tsort_each' 17: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/2.6.0/tsort.rb:226:intsort_each' 16: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/2.6.0/tsort.rb:347:in each_strongly_connected_component' 15: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/2.6.0/tsort.rb:347:incall' 14: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/2.6.0/tsort.rb:347:in each' 13: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/2.6.0/tsort.rb:349:inblock in each_strongly_connected_component' 12: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/2.6.0/tsort.rb:431:in each_strongly_connected_component_from' 11: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/2.6.0/tsort.rb:350:inblock (2 levels) in each_strongly_connected_component' 10: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/2.6.0/tsort.rb:228:in block in tsort_each' 9: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/initializable.rb:61:inblock in run_initializers' 8: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/initializable.rb:32:in run' 7: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/initializable.rb:32:ininstance_exec' 6: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/railtie.rb:84:in block in <class:Engine>' 5: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker.rb:27:inbootstrap' 4: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/commands.rb:14:in bootstrap' 3: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/manifest.rb:18:inrefresh' 2: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/manifest.rb:84:in load' 1: from C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/2.6.0/json/common.rb:156:inparse' C:/RailsInstaller_2_2_5/Ruby26/lib/ruby/2.6.0/json/common.rb:156:in `parse': 767: unexpected token at '' (JSON::ParserError)