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**Category:** Ignition\
**Created:** [January 21, 2026, 1:50am UTC](https://forum.inductiveautomation.com/t/webdev-module-404-not-found-when-accessing-html-via-mounted-folder/113432 "2026-01-21T01:50:35Z")\
**Posts on this page:** 3\
**Page:** 1
**Author:**  [@chentaoko](https://forum.inductiveautomation.com/u/chentaoko)\
**Post date:** [January 21, 2026, 1:50am UTC](https://forum.inductiveautomation.com/t/webdev-module-404-not-found-when-accessing-html-via-mounted-folder/113432/1 "2026-01-21T01:50:35Z")
Hi everyone,
I am trying to host a static HTML dashboard using the **WebDev module**. My goal is to use pure HTML/JS for the front-end while keeping Ignition for the back-end, but I am stuck on a 404 error.
**My Setup:**
1. **Project Name:** `YS_DB0_VisitDashBoard`
2. **WebDev Configuration:** I have created a "Mounted Folder" resource named `mounted_folder` in the Designer tree.
3. **Physical Path:** The mounted folder points to a valid Windows directory containing an `index.html` file. (See screenshots).
**The Issue:** When I try to access the file via the browser, I keep getting a **HTTP 404 Not Found** error.
I have tried accessing it via: `https://[IP]:8043/system/webdev/YS_DB0_VisitDashBoard/index.html` (and also tried including the resource name in the path)
**Questions:**
1. What is the correct URL structure to access a file inside a WebDev "Mounted Folder"?
2. Do I need to configure any specific permissions or "Anonymous Access" settings to make this HTML file visible?
Any advice would be appreciated. Thanks!
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**Author:**  [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [January 21, 2026, 2:05am UTC](https://forum.inductiveautomation.com/t/webdev-module-404-not-found-when-accessing-html-via-mounted-folder/113432/2 "2026-01-21T02:05:30Z")
Your mounted folder path appears to not be physically in the gateway machine, but in a network share. In Windows, by default, the account running the background service cannot access network shares.
There are numerous discussions on this forum about using UNC paths combined with a custom background user account, like this one:
> [@Gateway scripts cannot access to mapped drives](https://forum.inductiveautomation.com/t/gateway-scripts-cannot-access-to-mapped-drives/78213/6):
>
> Yes and no. That is the simple solution, but it is not robust. If a network share is not available when Ignition starts up, that mapped drive letter will not be available later. It doesn't fix itself. The proper answer is to not use mapped drives. AT ALL. Use UNC paths directly to the network resource wherever you would have used a mapped drive. For this to work properly, you need to change the user account under which Ignition runs to an account that has the necessary privileges on your…
But it is more robutst to simply place the files directly in the gateway filesystem.
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**Author:**  [@chentaoko](https://forum.inductiveautomation.com/u/chentaoko)\
**Post date:** [January 21, 2026, 2:19am UTC](https://forum.inductiveautomation.com/t/webdev-module-404-not-found-when-accessing-html-via-mounted-folder/113432/3 "2026-01-21T02:19:33Z")
I fixed it, thanks sir