我正在尝试在Heroku上部署我的后端。我已经尝试根据堆栈溢出的内容进行调试，但仍然遇到问题。
我的步骤： 1. heroku运行rails db：migrate 2. heroku运行rails db：seed，出现错误“ Rest：Client 504” 3. heroku打开“应用程序错误” 4. heroku日志--tail，我得到错误代码H10“应用程序崩溃” 5. heroku ps“崩溃” 6.然后，我运行“ heroku run rails c”以尝试缩小错误。
2020-01-09T05:14:50.031813+00:00 heroku[run.3751]: Awaiting client
2020-01-09T05:14:50.090305+00:00 heroku[run.3751]: Starting process with command `rails c`
2020-01-09T05:14:58.899663+00:00 heroku[run.3751]: State changed from up to complete
2020-01-09T05:14:58.883813+00:00 heroku[run.3751]: Process exited with status 1
2020-01-09T05:29:57.353967+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=abibas-ecommerce.herokuapp.com request_id=607ed6a1-35d9-4dac-9127-aa699de2ead3 fwd="66.108.54.163" dyno= connect= service= status=503 bytes= protocol=https
2020-01-09T05:29:57.931972+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=abibas-ecommerce.herokuapp.com request_id=b2294faf-83c2-4c80-8519-b9f798551e29 fwd="66.108.54.163" dyno= connect= service= status=503 bytes= protocol=https```
When I run "heroku run rails c" I get this error.
``` Traceback (most recent call last):
62: from /app/bin/rails:9:in `<main>'
61: from /app/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/dependencies.rb:325:in `require'
60: from /app/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/dependencies.rb:291:in `load_dependency'
59: from /app/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/dependencies.rb:325:in `block in require'
58: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
57: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
56: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
55: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
54: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
53: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/commands.rb:18:in `<main>'
52: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/command.rb:46:in `invoke'
51: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/command/base.rb:65:in `perform'
50: from /app/vendor/bundle/ruby/2.6.0/gems/thor-0.20.3/lib/thor.rb:387:in `dispatch'
49: from /app/vendor/bundle/ruby/2.6.0/gems/thor-0.20.3/lib/thor/invocation.rb:126:in `invoke_command'
48: from /app/vendor/bundle/ruby/2.6.0/gems/thor-0.20.3/lib/thor/command.rb:27:in `run'
47: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/commands/console/console_command.rb:101:in `perform'
46: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/command/actions.rb:15:in `require_application_and_environment!'
45: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/command/actions.rb:28:in `require_environment!'
44: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/application.rb:339:in `require_environment!'
43: from /app/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/dependencies.rb:325:in `require'
42: from /app/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/dependencies.rb:291:in `load_dependency'
41: from /app/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/dependencies.rb:325:in `block in require'
40: from /app/vendor/bundle/ruby/2.6.0/gems/zeitwerk-2.2.1/lib/zeitwerk/kernel.rb:23:in `require'
39: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
38: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
37: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
36: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
35: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
34: from /app/config/environment.rb:5:in `<main>'
33: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/application.rb:363:in `initialize!'
32: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/initializable.rb:60:in `run_initializers'
31: from /app/vendor/ruby-2.6.1/lib/ruby/2.6.0/tsort.rb:205:in `tsort_each'
30: from /app/vendor/ruby-2.6.1/lib/ruby/2.6.0/tsort.rb:226:in `tsort_each'
29: from /app/vendor/ruby-2.6.1/lib/ruby/2.6.0/tsort.rb:347:in `each_strongly_connected_component'
28: from /app/vendor/ruby-2.6.1/lib/ruby/2.6.0/tsort.rb:347:in `call'
27: from /app/vendor/ruby-2.6.1/lib/ruby/2.6.0/tsort.rb:347:in `each'
26: from /app/vendor/ruby-2.6.1/lib/ruby/2.6.0/tsort.rb:349:in `block in each_strongly_connected_component'
25: from /app/vendor/ruby-2.6.1/lib/ruby/2.6.0/tsort.rb:431:in `each_strongly_connected_component_from'
24: from /app/vendor/ruby-2.6.1/lib/ruby/2.6.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
23: from /app/vendor/ruby-2.6.1/lib/ruby/2.6.0/tsort.rb:228:in `block in tsort_each'
22: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/initializable.rb:61:in `block in run_initializers'
21: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/initializable.rb:32:in `run'
20: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/initializable.rb:32:in `instance_exec'
19: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/application/finisher.rb:122:in `block in <module:Finisher>'
18: from /app/vendor/bundle/ruby/2.6.0/gems/zeitwerk-2.2.1/lib/zeitwerk/loader.rb:449:in `eager_load_all'
17: from /app/vendor/bundle/ruby/2.6.0/gems/zeitwerk-2.2.1/lib/zeitwerk/loader.rb:449:in `each'
16: from /app/vendor/bundle/ruby/2.6.0/gems/zeitwerk-2.2.1/lib/zeitwerk/loader.rb:338:in `eager_load'
15: from /app/vendor/bundle/ruby/2.6.0/gems/zeitwerk-2.2.1/lib/zeitwerk/loader.rb:338:in `synchronize'
14: from /app/vendor/bundle/ruby/2.6.0/gems/zeitwerk-2.2.1/lib/zeitwerk/loader.rb:346:in `block in eager_load'
13: from /app/vendor/bundle/ruby/2.6.0/gems/zeitwerk-2.2.1/lib/zeitwerk/loader.rb:682:in `ls'
12: from /app/vendor/bundle/ruby/2.6.0/gems/zeitwerk-2.2.1/lib/zeitwerk/loader.rb:682:in `foreach'
11: from /app/vendor/bundle/ruby/2.6.0/gems/zeitwerk-2.2.1/lib/zeitwerk/loader.rb:685:in `block in ls'
10: from /app/vendor/bundle/ruby/2.6.0/gems/zeitwerk-2.2.1/lib/zeitwerk/loader.rb:351:in `block (2 levels) in eager_load'
9: from /app/vendor/bundle/ruby/2.6.0/gems/zeitwerk-2.2.1/lib/zeitwerk/loader.rb:351:in `const_get'
8: from /app/vendor/bundle/ruby/2.6.0/gems/zeitwerk-2.2.1/lib/zeitwerk/kernel.rb:16:in `require'
7: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
6: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
5: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
4: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
3: from /app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
2: from /app/app/controllers/orders_controller.rb:1:in `<main>'
1: from /app/vendor/bundle/ruby/2.6.0/gems/zeitwerk-2.2.1/lib/zeitwerk/kernel.rb:23:in `require'
/app/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:33:in `require': cannot load such file -- Date (LoadError)```
any help is appreciated. Thanks!