cannot open dashboard and console error shows 'the server responded with a MIME type of "text/plain".'

[LeiYangGH]

Prerequisites

• I am using the latest version of Locust
• I am reporting a bug, not asking a question

Description

i'm newbie and trying the hellow world from doc

PS C:\Users\LeiYang> D:\pv\loc\Scripts\Activate.ps1
(loc) PS C:\Users\LeiYang> locust -V
locust 2.24.0 from d:\pv\loc\lib\site-packages\locust (python 3.8.3)
(loc) PS C:\Users\LeiYang> cd D:\G\lucust-learn
(loc) PS D:\G\lucust-learn> locust -f .\demo.py
[2024-03-13 22:41:04,777] DESKTOP-1SLBP5D/WARNING/locust.main: Python 3.8 support is deprecated and will be removed soon
[2024-03-13 22:41:04,777] DESKTOP-1SLBP5D/INFO/locust.main: Starting web interface at http://localhost:8089 (accepting connections from all network interfaces)
[2024-03-13 22:41:04,816] DESKTOP-1SLBP5D/INFO/locust.main: Starting Locust 2.24.0

then i open above web page using either edge or chrome, both blank page, and console error is

Failed to load module script: Expected a JavaScript module script but the server responded with a MIME type of "text/plain". Strict MIME type checking is enforced for module scripts per HTML spec.

Command line

locust -f .\demo.py

Locustfile contents

from locust import HttpUser, task

class HelloWorldUser(HttpUser):
    @task
    def hello_world(self):
        self.client.get("/hello")
        self.client.get("/world")

Python version

3.8

Locust version

2.24.0

Operating system

windows 11

[Sh1co]

I encountered the same issue and wanted to share a temporary workaround. By switching to Windows Subsystem for Linux (WSL), I was able to bypass the problem for the time being. Additionally, I discovered that installing an older version of the package resolved the issue on my end. If anyone else is looking for a temporary fix, you might want to try installing version 2.18.4 of Locust using the following command:

pip install locust==2.18.4

I hope this helps others facing the same problem until a permanent solution is found.

[LeiYangGH]

I encountered the same issue and wanted to share a temporary workaround. By switching to Windows Subsystem for Linux (WSL), I was able to bypass the problem for the time being. Additionally, I discovered that installing an older version of the package resolved the issue on my end. If anyone else is looking for a temporary fix, you might want to try installing version 2.18.4 of Locust using the following command:

pip install locust==2.18.4

I hope this helps others facing the same problem until a permanent solution is found.

thanks, indeed this version can show the page.
though it says Starting web interface at http://0.0.0.0:8089 and i can only access by http://localhost:8089

[cyberw]

@andrewbaldwin44 Can you take a look?

Instead of running an old version of locust as a workaround, you can probably just add --legacy-ui

[andrewbaldwin44]

@LeiYangGH Could you please share what browser and version you are using?

[LeiYangGH]

chrome 122.0.6261.113（32 bit）

edge 123.0.2420.32 stable，beta channel (64 bit)

[LeiYangGH]

@andrewbaldwin44 Can you take a look?

Instead of running an old version of locust as a workaround, you can probably just add --legacy-ui

confirm this is working!

[andrewbaldwin44]

@LeiYangGH I just got the chance to try this on Windows 11. I have Python 3.12 and I am able to view the dashboard on both Edge and Chrome