# Can't open locally hosted streamlit app on browser **URL:** \ **Category:** Using Streamlit\ **Created:** [November 17, 2023, 8:20am UTC](https://discuss.streamlit.io/t/cant-open-locally-hosted-streamlit-app-on-browser/55636 "2023-11-17T08:20:35Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Shafiq\_Irusath](https://sea2.discourse-cdn.com/streamlit/user_avatar/discuss.streamlit.io/shafiq_irusath/32/28066_2.png) [@Shafiq\_Irusath](https://discuss.streamlit.io/u/Shafiq_Irusath)\ **Post date:** [November 17, 2023, 8:20am UTC](https://discuss.streamlit.io/t/cant-open-locally-hosted-streamlit-app-on-browser/55636/1 "2023-11-17T08:20:35Z")
Hi, a beginner here, need help Trying to run the locally hosted streamlit app but not able to open in browser **Error on browser** # This site can’t be reached **localhost** refused to connect. Try: - Checking the connection - Checking the proxy and the firewall ERR\_CONNECTION\_REFUSED **Command** Microsoft Windows [Version 10.0.19045.3570] (c) Microsoft Corporation. All rights reserved. C:\Users\User\>E: E:\>mkdir chatbot\_project A subdirectory or file chatbot\_project already exists. E:\>cd chatbot\_projectstreamlit run streamlit\_app.py The system cannot find the path specified. E:\>cd chatbot\_project E:\chatbot\_project\>streamlit run streamlit\_app.py ‘streamlit’ is not recognized as an internal or external command, operable program or batch file. E:\chatbot\_project\>.\venv\Scripts\activate (venv) E:\chatbot\_project\>streamlit run streamlit\_app.py ``` Welcome to Streamlit! If you’d like to receive helpful onboarding emails, news, offers, promotions, and the occasional swag, please enter your email address below. Otherwise, leave this field blank. ``` **Notepad code** import streamlit as st st.set\_option(‘server.port’, 8502) def main(): st.title(“Chatbot UI”) user\_input = st.text\_input(“Enter your message:”) st.button(“Send”) if **name** == “ **main** ”: main() ---
**Author:** ![Goyo](https://sea2.discourse-cdn.com/streamlit/user_avatar/discuss.streamlit.io/goyo/32/28219_2.png) [@Goyo](https://discuss.streamlit.io/u/Goyo)\ **Post date:** [November 17, 2023, 8:52am UTC](https://discuss.streamlit.io/t/cant-open-locally-hosted-streamlit-app-on-browser/55636/2 "2023-11-17T08:52:44Z")
How can that possibly work? By the time `st.set_option('server.port', 8502)` is executed, the server has already started. And you would need to change the code to make it run in a different port. Besides, the welcome message suggest me that your streamlit is quite old. In a recent version you would get this (IP redacted): ```auto (venv) E:\chatbot_project>streamlit run streamlit_app.py You can now view your Streamlit app in your browser. Local URL: http://localhost:8501 Network URL: http://xxx.xxx.xxx.xxx:8501 2023-11-17 09:40:24.250 Uncaught app exception Traceback (most recent call last): File "E:\chatbot_project\venv\Lib\site-packages\streamlit\runtime\scriptrunner\script_runner.py", line 534, in _run_script exec(code, module. __dict__ ) File "E:\chatbot_project\streamlit_app.py", line 3, in st.set_option('server.port', 8502) File "E:\chatbot_project\venv\Lib\site-packages\streamlit\runtime\metrics_util.py", line 396, in wrapped_func result = non_optional_func(*args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "E:\chatbot_project\venv\Lib\site-packages\streamlit\config.py", line 124, in set_user_option raise StreamlitAPIException( streamlit.errors.StreamlitAPIException: server.port cannot be set on the fly. Set as command line option, e.g. streamlit run script.py --server.port, or in config.toml instead. ``` ---
**Author:** ![Shafiq\_Irusath](https://sea2.discourse-cdn.com/streamlit/user_avatar/discuss.streamlit.io/shafiq_irusath/32/28066_2.png) [@Shafiq\_Irusath](https://discuss.streamlit.io/u/Shafiq_Irusath)\ **Post date:** [November 17, 2023, 9:55am UTC](https://discuss.streamlit.io/t/cant-open-locally-hosted-streamlit-app-on-browser/55636/3 "2023-11-17T09:55:27Z")
Hi really appreciate your response. I’ve edited the code based on what I understand from your reply. Still can’t access in browser **Command** (venv) E:\chatbot\_project\>streamlit --version Streamlit, version 1.28.2 it says requirement already satisfied **My new notepad code** import streamlit as st def main(): st.title(“Chatbot Streamlit App”) user\_input = st.text\_input(“Enter your message:”) if st.button(“Send”): chatbot\_response = get\_chatbot\_response(user\_input) st.text\_area(“Chatbot Response:”, chatbot\_response, height=100) def get\_chatbot\_response(user\_input): return "Chatbot: Hello! I’m a simple chatbot. You said: " + user\_input if **name** == “ **main** ”: main() ---
**Author:** ![Goyo](https://sea2.discourse-cdn.com/streamlit/user_avatar/discuss.streamlit.io/goyo/32/28219_2.png) [@Goyo](https://discuss.streamlit.io/u/Goyo)\ **Post date:** [November 17, 2023, 11:27am UTC](https://discuss.streamlit.io/t/cant-open-locally-hosted-streamlit-app-on-browser/55636/4 "2023-11-17T11:27:24Z")
The code looks right and “can’t access in browser” doesn’t really tell much about what is going on. Are there any error messages? ---
**Author:** ![Shafiq\_Irusath](https://sea2.discourse-cdn.com/streamlit/user_avatar/discuss.streamlit.io/shafiq_irusath/32/28066_2.png) [@Shafiq\_Irusath](https://discuss.streamlit.io/u/Shafiq_Irusath)\ **Post date:** [November 28, 2023, 8:45am UTC](https://discuss.streamlit.io/t/cant-open-locally-hosted-streamlit-app-on-browser/55636/5 "2023-11-28T08:45:18Z")
Thank you for your assistance. At the moment, I’ve identified an alternative solution. I appreciate your help. ---
**Author:** ![naveen\_yadav](https://sea2.discourse-cdn.com/streamlit/user_avatar/discuss.streamlit.io/naveen_yadav/32/28679_2.png) [@naveen\_yadav](https://discuss.streamlit.io/u/naveen_yadav)\ **Post date:** [February 1, 2024, 9:57pm UTC](https://discuss.streamlit.io/t/cant-open-locally-hosted-streamlit-app-on-browser/55636/6 "2024-02-01T21:57:53Z")
can you please help me with this , i m also geeting same thing in terminal PS C:\Users\Naveen\PycharmProjects\Email\sms-classifier\> streamlit run app.py ``` Welcome to Streamlit! If you’d like to receive helpful onboarding emails, news, offers, promotions, and the occasional swag, please enter your email address below. Otherwise, leave this field blank. Email: ``` ---
**Author:** ![Oscar1](https://avatars.discourse-cdn.com/v4/letter/o/35a633/32.png) [@Oscar1](https://discuss.streamlit.io/u/Oscar1)\ **Post date:** [February 1, 2024, 10:04pm UTC](https://discuss.streamlit.io/t/cant-open-locally-hosted-streamlit-app-on-browser/55636/7 "2024-02-01T22:04:36Z")
Hi, you can enter your e.mail or if you don’t want to press enter and welcome. ---
**Author:** ![system](https://global.discourse-cdn.com/streamlit/original/3X/c/f/cf4c2ee0d938358f82448c5fe4b9c3c91d7ce19c.svg) [@system](https://discuss.streamlit.io/u/system)\ **Post date:** [July 30, 2024, 10:05pm UTC](https://discuss.streamlit.io/t/cant-open-locally-hosted-streamlit-app-on-browser/55636/8 "2024-07-30T22:05:08Z")
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