uninitialized constant SolidusAffirmV2::PaymentMethod (NameError)

[yousamaa]

I upgraded my rails app from 6.1 to 7.0 and now I am getting this error. I edited the engine.rb file locally using bundle open command and it worked fine. This is my edited file:
`# frozen_string_literal: true

require 'spree/core'
require 'solidus_affirm_v2'

module SolidusAffirmV2
class Engine < Rails::Engine
include SolidusSupport::EngineExtensions

isolate_namespace ::Spree

engine_name 'solidus_affirm_v2'
config.autoload_once_paths << "#{root}/app/helpers"

# use rspec for tests
config.generators do |g|
  g.test_framework :rspec
end

initializer "register_solidus_affirm_v2_payment_method", after: "spree.register.payment_methods" do |app|
  config.to_prepare do
    app.config.spree.payment_methods << SolidusAffirmV2::PaymentMethod
  end
end

initializer "register_solidus_affirm_v2_configuration", before: :load_config_initializers do |_app|
  config.to_prepare do
    SolidusAffirmV2::Config = SolidusAffirmV2::Configuration.new
  end
end

initializer 'register_solidus_affirm_v2_helper_action_controller' do |_app|
  ActiveSupport.on_load :action_controller do |klass|
    next if klass.name == "ActionController::API"

     helper SolidusAffirmV2::AffirmHelper
          end
end

end
end
`

Traceback (most recent call last): 50: from bin/rails:4:in

'
49: from /home/dev/.rvm/gems/ruby-2.7.8/gems/bootsnap-1.17.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in require' 48: from /home/dev/.rvm/gems/ruby-2.7.8/gems/bootsnap-1.17.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in require'
47: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/commands.rb:18:in <main>' 46: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/command.rb:48:in invoke'
45: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/command/base.rb:87:in perform' 44: from /home/dev/.rvm/gems/ruby-2.7.8/gems/thor-1.3.0/lib/thor.rb:527:in dispatch'
43: from /home/dev/.rvm/gems/ruby-2.7.8/gems/thor-1.3.0/lib/thor/invocation.rb:127:in invoke_command' 42: from /home/dev/.rvm/gems/ruby-2.7.8/gems/thor-1.3.0/lib/thor/command.rb:28:in run'
41: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/commands/server/server_command.rb:134:in perform' 40: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/commands/server/server_command.rb:134:in tap'
39: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/commands/server/server_command.rb:143:in block in perform' 38: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/commands/server/server_command.rb:36:in start'
37: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/commands/server/server_command.rb:76:in log_to_stdout' 36: from /home/dev/.rvm/gems/ruby-2.7.8/gems/rack-2.2.8/lib/rack/server.rb:422:in wrapped_app'
35: from /home/dev/.rvm/gems/ruby-2.7.8/gems/rack-2.2.8/lib/rack/server.rb:249:in app' 34: from /home/dev/.rvm/gems/ruby-2.7.8/gems/rack-2.2.8/lib/rack/server.rb:349:in build_app_and_options_from_config'
33: from /home/dev/.rvm/gems/ruby-2.7.8/gems/rack-2.2.8/lib/rack/builder.rb:66:in parse_file' 32: from /home/dev/.rvm/gems/ruby-2.7.8/gems/rack-2.2.8/lib/rack/builder.rb:105:in load_file'
31: from /home/dev/.rvm/gems/ruby-2.7.8/gems/rack-2.2.8/lib/rack/builder.rb:116:in new_from_string' 30: from /home/dev/.rvm/gems/ruby-2.7.8/gems/rack-2.2.8/lib/rack/builder.rb:116:in eval'
29: from config.ru:3:in block in <main>' 28: from config.ru:3:in require_relative'
27: from /home/dev/Documents/sample-store/config/environment.rb:5:in <main>' 26: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/application.rb:372:in initialize!'
25: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/initializable.rb:60:in run_initializers' 24: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:205:in tsort_each'
23: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:226:in tsort_each' 22: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:347:in each_strongly_connected_component'
21: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:347:in call' 20: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:347:in each'
19: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:349:in block in each_strongly_connected_component' 18: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:415:in each_strongly_connected_component_from'
17: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:415:in call' 16: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/initializable.rb:50:in tsort_each_child'
15: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/initializable.rb:50:in each' 14: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:421:in block in each_strongly_connected_component_from'
13: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:415:in each_strongly_connected_component_from' 12: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:415:in call'
11: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/initializable.rb:50:in tsort_each_child' 10: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/initializable.rb:50:in each'
9: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:421:in block in each_strongly_connected_component_from' 8: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:431:in each_strongly_connected_component_from'
7: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:422:in block (2 levels) in each_strongly_connected_component_from' 6: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:422:in block (2 levels) in each_strongly_connected_component_from'
5: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:350:in block (2 levels) in each_strongly_connected_component' 4: from /home/dev/.rvm/rubies/ruby-2.7.8/lib/ruby/2.7.0/tsort.rb:228:in block in tsort_each'
3: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/initializable.rb:61:in block in run_initializers' 2: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/initializable.rb:32:in run'
1: from /home/dev/.rvm/gems/ruby-2.7.8/gems/railties-7.0.2/lib/rails/initializable.rb:32:in instance_exec' /home/dev/.rvm/gems/ruby-2.7.8/bundler/gems/solidus_affirm_v2-e14eac886ea2/lib/solidus_affirm_v2/engine.rb:20:in block in class:Engine': uninitialized constant SolidusAffirmV2::PaymentMethod (NameError)`