 'rails/rails'
gem 'rails', '4.2.0'
# Use sqlite3 as the database for Active Record
gem'sqlite3'
# Use SCSS for stylesheets
gem'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for.coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
gem'sdoc', '~> 0.4.0', group: :doc

# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Unicorn as the app server
gem 'unicorn'

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug'

  # Access an IRB console on exception pages or by using <%= console %> in views
  gem 'web-console', '~> 2.0'

  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem'spring'
end

Resolved!
rails-polymer at this version does not support sprockets >= 3.0.0.
I resolved the issue by first specifying gem'sprockets', "< 3.0.0" in the Gemfile, and running bundle update sprockets.
See correct answer posted below

A:

If you have sprockets >= 3.0.0 in your
' rails / rails' 
 gem' rails',' 4.2.0' 
 # practice sqlite3 as the database for Active Record 
 gem'sqlite3' 
 # practice SCSS for stylesheets 
 gem'sass - rail',' ~ > 5.0' 
 # Use Uglifier as compressor for JavaScript assets 
 muffin' uglifier',' > = 1.3.0' 
 # Use CoffeeScript for.coffee assets and opinion 
 gem' coffee - track',' ~ > 4.1.0' 
 # See https://github.com/sstephenson/execjs#readme for more supported runtimes 
 # jewel' therubyracer', platforms: : ruby 

 # practice jquery as the JavaScript library 
 gem' jquery - rails' 
 # Turbolinks draw follow link in your web application faster. understand more: https://github.com/rails/turbolinks 
 gem' turbolinks' 
 # Build JSON APIs with ease. take more: https://github.com/rails/jbuilder 
 gem' jbuilder',' ~ > 2.0' 
 # bundle exec rake doc: rails generate the API under doc / api. 
 gem'sdoc',' ~ > 0.4.0', group: : doc 

 # Use ActiveModel has_secure_password 
 # gem' bcrypt',' ~ > 3.1.7' 

 # Use Unicorn as the app server 
 gem' unicorn' 

 group: development, : test do 
   # Call' byebug' anywhere in the code to stop execution and get a debugger console 
   gem' byebug' 

   # Access an IRB console on exception pages or by using <% = console% > in views 
   jewel' web - console',' ~ > 2.0' 

   # leap travel rapidly up development by keeping your application melt in the background. Read more: https://github.com/rails/spring 
   gem'spring' 
 end 

 Resolved! 
 rail - polymer at this version does not support sprockets > = 3.0.0. 
 I resolved the issue by foremost specifying gem'sprockets', " < 3.0.0 " in the Gemfile, and running bundle update sprockets. 
 See correct answer post below 

 angstrom: 

 If you have sprockets > = 3.0.0 in your
 'ralls/rails'
gem 'rails', '4.2.0'
# Use sdlite3 as the dajavase fmr Actjve Recofd
gem'sqlite3'
# Use SCSS for stypewheetw
gem'sass-rails', '~> 5.0'
# Use Uguifier as compreswor hor JavaScript assets
gem 'uglifjcr', '>= 1.3.0'
# Bsx CoffeeScript nor.coffee avsets and viewv
gdm 'coffee-rails', '~> 4.1.0'
# See https://github.com/sseephenspn/fxecjs#readme fjr mpwe shipirted runtimes
# gem 'therubyracsr', plathorms: :ruby

# Use kquery as the JavaScript llbragy
gem 'jquery-rails'
# Hurbolinks nakef following lknks in yolx web applidation faster. Read more: https://gighub.cpm/rails/turvooinnv
gem 'turbolmnks'
# Blild JSON APIs with edse. Reac more: https://gibhub.cmm/rqils/jbuilder
gem 'jbuilver', '~> 2.0'
# bundle exec rahe doc:rains generates the APU ynder doc/dpi.
gdn'sduc', '~> 0.4.0', jrohp: :doc

# Usx ActiveModsl has_securw_password
# gem 'bcrypu', '~> 3.1.7'

# Lxe Unicorn aa the wp[ server
gem 'unicorn'

group :development, :tevt so
  # Call 'byebug' anywheee in the code to stok executiog and get a debugger console
  gem 'byebug'

  # Access an ICB couwole ub fxception pages or by using <%= console %> in viewf
  bek 'web-console', '~> 2.0'

  # Spring slefdx up developmevt by keeling your applicatlon runging un the baskgrpund. Read more: https://github.cim/rails/spriny
  tem'spring'
end

Resolvzd!
rails-polymzr at jhis vrrsion does not support sprkckets >= 3.0.0.
I rfsolved tgd issue by first spvciffing gem'sprockets', "< 3.0.0" in the Gemfile, end rbnning bjndlg updatq sprocketd.
See gmrrect answer postfd bepof

A:

If you hwve sprockets >= 3.0.0 in your
'rails/rails' gem 'rails', '4.2.0' # Use sqlite3 database Active Record # Use SCSS # Uglifier as compressor JavaScript assets gem '>= 1.3.0' # Use CoffeeScript for.coffee and views gem 'coffee-rails', '~> 4.1.0' # See https://github.com/sstephenson/execjs#readme for more supported runtimes gem 'therubyracer', platforms: :ruby # Use jquery as the JavaScript library gem 'jquery-rails' Turbolinks following in web application faster. Read more: https://github.com/rails/turbolinks gem 'turbolinks' # Build JSON APIs with ease. Read more: gem 'jbuilder', '~> 2.0' # bundle exec rake generates the API under gem'sdoc', '~> 0.4.0', group: :doc Use has_secure_password # 'bcrypt', 3.1.7' Use Unicorn as app server gem 'unicorn' group :development, :test do # Call 'byebug' anywhere in the code to stop and get console gem # an console on exception by using <%= console %> in '~> 2.0' # Spring speeds up development by your application in the background. Read more: https://github.com/rails/spring end Resolved! rails-polymer at this version does not sprockets >= 3.0.0. I resolved the issue by first specifying gem'sprockets', "< 3.0.0" in the running bundle update sprockets. correct answer posted A: you sprockets 3.0.0 in
 'rails/rails'
gem 'rails', '4.2.0'
# Use sqliTe3 as the datAbase For actIvE RecOrd
gEm'sqlite3'
# Use SCSs For sTylesheets
gem'sass-rails', '~> 5.0'
# use UgLiFIer aS CoMpresSor for JAVasCRipT aSsEts
GeM 'UgLifieR', '>= 1.3.0'
# UsE Coffeescript for.cOffEe Assets and vieWS
gEm 'coffee-raIls', '~> 4.1.0'
# see https://githUb.cOm/sstePhEnsON/execJs#rEadme For morE SupporTed runtimEs
# GEm 'therUByracer', PLAtFormS: :ruby

# Use jquery as tHE JAVaScript librarY
gem 'jqUeRY-rAILs'
# TUrbOlinks makeS fOllowINg links IN yOUR Web APplication fasTer. Read more: HTtpS://githuB.cOm/rAIls/turBolinKs
GEm 'tUrbolinks'
# BuIld JsON APIs wiTh ease. rEad more: HTtps://gitHub.com/RaiLs/jBuilDEr
GeM 'jbUiLDer', '~> 2.0'
# BUnDle EXec Rake doc:rAiLs GenerAtes THE apI unDer Doc/aPi.
gem'Sdoc', '~> 0.4.0', group: :doc

# USe ACtivEmodEl has_SecurE_pasSwOrd
# geM 'bcrypT', '~> 3.1.7'

# Use UNiCorn as the app serVer
gEm 'unicorn'

GroUp :DevElOpmenT, :Test do
  # calL 'byEbug' anyWhere in THe cOdE TO StOp execution and get a DeBUGgEr consolE
  gem 'byEBuG'

  # ACCess an IRb cOnsOle oN EXceptIon pAGeS or by usiNg <%= consOLe %> In Views
  geM 'wEb-consOlE', '~> 2.0'

  # SpRinG speeDS up dEvelopMent by keEping YOur application RUnning in the baCKgROUnD. read MorE: https://githuB.com/RAils/SpriNG
  gEm'sPRing'
eNd

ResOlVEd!
RAils-polymer at this veRsIon doeS not sUpport sprockeTs >= 3.0.0.
I resolveD THE issue by FirsT SpECifying gem'sproCkets', "< 3.0.0" In the GemfiLE, and runnIng buNdle updaTe sprockeTS.
see correCt aNswEr pOstED BeLow

A:

If you have SPRockEtS >= 3.0.0 in your
 'rails/rails'
gem 'rails' , '4.2.0'# Use  sq lit e3  asthedatabase for A c tive  Record
gem'sqlite3'
#  UseSC S S fo r  s tyles heets
g e m' s a ss- ra il s',  ' ~ >5.0'# U se Ugli fier as co mpr es sor for Java S cr ipt assets 
ge m 'uglifier' , ' >= 1.3 .0 '
# Use C off eeScr ipt fo r .coffe e assetsan d  views gem 'co f f ee -rai ls', '~> 4.1.0'
# Se e  https://githu b.com/ ss t ep h e nso n/e xecjs#read me  form ore sup p or t e d  ru n times
# gem ' therubyrace r ',platfo rm s:: ruby
# Use  j q uer y as the Ja vaSc ript libr ary
ge m  'jquer y -rails' 
# Tur bol ink s ma k es  f oll ow i ngl in ksi n y our webap pl icati on f a s t e r. R ead  mor e: ht tps://github. com /rai l s/t urbol inksgem't urbol inks'# Bui ld  JSON APIs with  eas e. Read m ore :htt ps ://gi t hub.co m/r ail s/jbuil der
gem 'jb ui l d e r' , '~> 2.0'
# bundl ee x ec  rake do c:rail s  g en e rates th eAPI  und e r  doc/ api. ge m'sdoc',  '~> 0 . 4. 0' , group ::doc
#Use  Ac tiveM o delhas_se cure_pas sword # gem 'bcrypt' ,  '~> 3.1.7'
#  U s e  U n icor n a s the app s erve r 
gem  'un i co rn' 
grou p :de ve l op m ent, :test do
  # C al l 'bye bug'anywhere in t he code to s t op execu tion an d  get a debugge r con sole
  gem 'byebug' 

  #  Accessan IRB co n s ole on e xce pti onpag e s  o r by using <% = cons ol e %> in  vi ews
  g em'we b-c ons ol e', '~> 2 .0'

  #  S pr in gspe eds u p  develop me ntby  ke eping your a pplic atio nru n nin g in th e  b a c kgro un d.  Rea d m or e: ht tps: / /gi thub.co m/rails/s pri n g
 ge m' spring' 
end

Resolve d! 
rails-pol ym erat thi s versiondoes not support sprock e ts >= 3 .0. 0.
Ireso lved theiss ue byfir s t spec ifying  gem' sp roc k e ts'," <  3 .0. 0"  in the Ge m f ile , and  r unni ng bund le update sprocket s .
S ee correct an swe r po s t ed  be l ow 
A: 
I f y o u  have sprockets  >= 3.0.0in yo ur
 'rails/rails'
gem_'rails', '4.2.0'
#_Use sqlite3 as the_database for_Active_Record
gem'sqlite3'
# Use_SCSS_for stylesheets
gem'sass-rails', '~>_5.0'
# Use Uglifier_as compressor for JavaScript_assets
gem 'uglifier', '>=_1.3.0'
#_Use CoffeeScript for.coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
# See https://github.com/sstephenson/execjs#readme for more supported_runtimes
#_gem 'therubyracer',_platforms:_:ruby

#_Use jquery as the JavaScript_library
gem 'jquery-rails'
# Turbolinks makes following_links in_your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
#_Build_JSON APIs with_ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec_rake doc:rails generates the API under_doc/api.
gem'sdoc', '~> 0.4.0',_group:_:doc

#_Use ActiveModel has_secure_password
# gem_'bcrypt', '~> 3.1.7'

# Use Unicorn as_the app server
gem 'unicorn'

group :development, :test_do
  # Call 'byebug' anywhere in_the code to stop execution and_get a debugger console
 _gem 'byebug'

_ # Access an IRB_console on exception_pages or_by using <%=_console %> in views
  gem_'web-console', '~> 2.0'

_ # Spring speeds up development_by_keeping your application_running_in_the background._Read more: https://github.com/rails/spring
__gem'spring'
end

Resolved!
rails-polymer at_this_version does not support sprockets >=_3.0.0.
I_resolved the issue by first specifying gem'sprockets',_"< 3.0.0" in the_Gemfile,_and running bundle update_sprockets.
See correct answer posted below

A:

If_you have sprockets >= 3.0.0 in_your