嗨，我正在使用 Python 框架构建 Dash 应用程序，我的构建日志表明该应用程序已成功构建。事实上，当我访问 Heroku 网站时，它会在构建日志下显示构建成功。但是，当我查看 Heroku URL 时，它说应用程序错误。以下是构建日志，感谢任何帮助。我还尝试重新启动应用程序，因为 Heroku 文档表明某些错误只能通过重新启动方法捕获，但日志中仍然没有出现错误。
-----> Building on the Heroku-20 stack
-----> Using buildpack: heroku/python
-----> Python app detected
-----> No Python version was specified. Using the same version as the last build: python-3.9.6
To use a different version, see: https://devcenter.heroku.com/articles/python-runtimes
-----> Requirements file has been changed, clearing cached dependencies
-----> Installing python-3.9.6
-----> Installing pip 20.2.4, setuptools 47.1.1 and wheel 0.36.2
-----> Installing SQLite3
-----> Installing requirements with pip
Collecting beautifulsoup4==4.9.3
Downloading beautifulsoup4-4.9.3-py3-none-any.whl (115 kB)
Collecting Brotli==1.0.9
Downloading Brotli-1.0.9-cp39-cp39-manylinux1_x86_64.whl (357 kB)
Collecting bs4==0.0.1
Downloading bs4-0.0.1.tar.gz (1.1 kB)
Collecting click==8.0.1
Downloading click-8.0.1-py3-none-any.whl (97 kB)
Collecting colorama==0.4.4
Downloading colorama-0.4.4-py2.py3-none-any.whl (16 kB)
Collecting dash==1.20.0
Downloading dash-1.20.0.tar.gz (77 kB)
Collecting dash-core-components==1.16.0
Downloading dash_core_components-1.16.0.tar.gz (3.5 MB)
Collecting dash-html-components==1.1.3
Downloading dash_html_components-1.1.3.tar.gz (82 kB)
Collecting dash-renderer==1.9.1
Downloading dash_renderer-1.9.1.tar.gz (1.0 MB)
Collecting dash-table==4.11.3
Downloading dash_table-4.11.3.tar.gz (1.8 MB)
Collecting Flask==2.0.1
Downloading Flask-2.0.1-py3-none-any.whl (94 kB)
Collecting Flask-Compress==1.10.1
Downloading Flask_Compress-1.10.1-py3-none-any.whl (7.9 kB)
Collecting future==0.18.2
Downloading future-0.18.2.tar.gz (829 kB)
Collecting gunicorn==20.1.0
Downloading gunicorn-20.1.0-py3-none-any.whl (79 kB)
Collecting itsdangerous==2.0.1
Downloading itsdangerous-2.0.1-py3-none-any.whl (18 kB)
Collecting Jinja2==3.0.1
Downloading Jinja2-3.0.1-py3-none-any.whl (133 kB)
Collecting MarkupSafe==2.0.1
Downloading MarkupSafe-2.0.1-cp39-cp39-manylinux2010_x86_64.whl (30 kB)
Collecting numpy==1.21.0
Downloading numpy-1.21.0-cp39-cp39-manylinux_2_12_x86_64.manylinux2010_x86_64.whl (15.7 MB)
Collecting pandas==1.3.0
Downloading pandas-1.3.0-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.whl (10.6 MB)
Collecting plotly==5.1.0
Downloading plotly-5.1.0-py2.py3-none-any.whl (20.6 MB)
Collecting python-dateutil==2.8.1
Downloading python_dateutil-2.8.1-py2.py3-none-any.whl (227 kB)
Collecting pytz==2021.1
Downloading pytz-2021.1-py2.py3-none-any.whl (510 kB)
Collecting six==1.16.0
Downloading six-1.16.0-py2.py3-none-any.whl (11 kB)
Collecting soupsieve==2.2.1
Downloading soupsieve-2.2.1-py3-none-any.whl (33 kB)
Collecting tenacity==8.0.0
Downloading tenacity-8.0.0-py3-none-any.whl (22 kB)
Collecting Werkzeug==2.0.1
Downloading Werkzeug-2.0.1-py3-none-any.whl (288 kB)
Building wheels for collected packages: bs4, dash, dash-core-components, dash-html-components, dash-renderer, dash-table, future
Building wheel for bs4 (setup.py): started
Building wheel for bs4 (setup.py): finished with status 'done'
Created wheel for bs4: filename=bs4-0.0.1-py3-none-any.whl size=1273 sha256=b96960a58059282bdc82d938f2b1b6fb6b3c09d46f25f346c964360e74cfa048
Stored in directory: /tmp/pip-ephem-wheel-cache-bp3kgu6x/wheels/73/2b/cb/099980278a0c9a3e57ff1a89875ec07bfa0b6fcbebb9a8cad3
Building wheel for dash (setup.py): started
Building wheel for dash (setup.py): finished with status 'done'
Created wheel for dash: filename=dash-1.20.0-py3-none-any.whl size=85831 sha256=cfb661b8db05c5bdb3e3d8b83e625e9dfd15352eafca46b4d4a851a496bc5210
Stored in directory: /tmp/pip-ephem-wheel-cache-bp3kgu6x/wheels/4b/cb/a6/817d490fb0a1abb2d078b9e9ee835bf7f039d1fd8b9c61b25e
Building wheel for dash-core-components (setup.py): started
Building wheel for dash-core-components (setup.py): finished with status 'done'
Created wheel for dash-core-components: filename=dash_core_components-1.16.0-py3-none-any.whl size=3540991 sha256=0ee679674b63fe67a3be0634132063574ce02e3621d860f273312f2fe8ab3c36
Stored in directory: /tmp/pip-ephem-wheel-cache-bp3kgu6x/wheels/a1/21/97/554773c64b38bf753f189054921c9217174a96d500f15b7f93
Building wheel for dash-html-components (setup.py): started
Building wheel for dash-html-components (setup.py): finished with status 'done'
Created wheel for dash-html-components: filename=dash_html_components-1.1.3-py3-none-any.whl size=319471 sha256=9d31ced0fc5469eca3d738cf82d1f6e67b8fc4dcfc4670f4f725e0c1ec31886c
Stored in directory: /tmp/pip-ephem-wheel-cache-bp3kgu6x/wheels/f7/eb/55/521dda099c8b09eed0178328cbe10306cb3fee851efd70ae4f
Building wheel for dash-renderer (setup.py): started
Building wheel for dash-renderer (setup.py): finished with status 'done'
Created wheel for dash-renderer: filename=dash_renderer-1.9.1-py3-none-any.whl size=1014878 sha256=36518dc881b0aa2d81d6693ce1acfd3fa02fddd94064b0bb6364aca71ae5025e
Stored in directory: /tmp/pip-ephem-wheel-cache-bp3kgu6x/wheels/52/2f/28/956ce9f7763c886d23f0082829bd726e5dacd6c708a5841c77
Building wheel for dash-table (setup.py): started
Building wheel for dash-table (setup.py): finished with status 'done'
Created wheel for dash-table: filename=dash_table-4.11.3-py3-none-any.whl size=1827618 sha256=15003b86d61d36cd73121c93b98df95d4b095a1460988acf05dfa8637b88f9de
Stored in directory: /tmp/pip-ephem-wheel-cache-bp3kgu6x/wheels/fb/0c/3d/fd6e565aa34ba87d6d110898b3297d2b78ef70339f1c2a483e
Building wheel for future (setup.py): started
Building wheel for future (setup.py): finished with status 'done'
Created wheel for future: filename=future-0.18.2-py3-none-any.whl size=491059 sha256=c30e1e964c5831e386abe653832f6f508b4e0feafd66f9cbfa8038fa0791d4de
Stored in directory: /tmp/pip-ephem-wheel-cache-bp3kgu6x/wheels/2f/a0/d3/4030d9f80e6b3be787f19fc911b8e7aa462986a40ab1e4bb94
Successfully built bs4 dash dash-core-components dash-html-components dash-renderer dash-table future
Installing collected packages: soupsieve, beautifulsoup4, Brotli, bs4, click, colorama, itsdangerous, Werkzeug, MarkupSafe, Jinja2, Flask, Flask-Compress, six, tenacity, plotly, dash-renderer, dash-core-components, dash-html-components, dash-table, future, dash, gunicorn, numpy, pytz, python-dateutil, pandas
Successfully installed Brotli-1.0.9 Flask-2.0.1 Flask-Compress-1.10.1 Jinja2-3.0.1 MarkupSafe-2.0.1 Werkzeug-2.0.1 beautifulsoup4-4.9.3 bs4-0.0.1 click-8.0.1 colorama-0.4.4 dash-1.20.0 dash-core-components-1.16.0 dash-html-components-1.1.3 dash-renderer-1.9.1 dash-table-4.11.3 future-0.18.2 gunicorn-20.1.0 itsdangerous-2.0.1 numpy-1.21.0 pandas-1.3.0 plotly-5.1.0 python-dateutil-2.8.1 pytz-2021.1 six-1.16.0 soupsieve-2.2.1 tenacity-8.0.0
-----> Discovering process types
Procfile declares types -> web
-----> Compressing...
Done: 113.1M
-----> Launching...
Released v4
https://senate-dash-app.herokuapp.com/ deployed to Heroku