---
schema_version: "1"
id: 9a6bc335c25de47cf4c372813f5ee1589b9d38856c6423489e5e91e9d648db38
title: HTTP 404 - File Not Found
collection: tableau
version: current
locale: en-us
portal_url: https://docs.salesforce.com/tableau/current/en-us/server/trusted_auth_trouble_404.md
canonical_url: https://help.tableau.com/current/server/en-us/trusted_auth_trouble_404.htm
source_site: help.tableau.com
content_type: documentation
content_hash: 7097ed8c39971942d0a86d1ad4e84985dfec6a2912b9b3d7edb38dcb90f19a41
description: Understand the HTTP 404 File Not Found error in trusted authentication.
---
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# HTTP 404 - File Not Found

You may receive this error if your program code references a Tableau Server URL that does not exist. For example, your web server may construct an invalid URL that cannot be found when the webpage tries to retrieve it.

Another cause for this error is if you did not enter the trusted web servers as specified in [Add Trusted IP Addresses or Host Names to Tableau Server](https://help.tableau.com/current/server/en-us/trusted_auth_trustIP.htm). If you have already entered the trusted web servers, verify that the IP addresses or host names are correct.