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Summary :

server error in '/' application

Have you encountered "Server Error in '/' Application"? The causes of the error may be various. In this post, MiniTool Partition Wizard lists some common reasons of this error and offers you corresponding solutions.

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About "Server Error in '/' Application"

"Server error in '/' application" issue is an application error on the server that prevents the website from running. And this error is usually related to IIS and ASP.NET.

  • IIS (Internet Information Services): It is an extensible web server service created by Microsoft for use with the Windows NT family. It is a kind of web server. Once a website is created, it must have a web server. Thus, others can browse your website.
  • NET: It is a category library provided by Microsoft in the .NET Framework for developing Web applications. It can run on the IIS server with .NET Framework installed, and use HTML, CSS, JavaScript and server scripts to create web pages and websites.

"Server error in '/' application" issue may be caused by various reasons. Some of the most common reasons include:

  • IIS has some problems and needs to be restarted.
  • It's just a 404 error. The resource you are looking for is missing or has been renamed.
  • You are accessing a file with a file extension that does not have permissions to be run on the server
  • You are using a version of .NET Framework incompatible with some programs, features, and file types.

If you don't know what causes your "Server error in '/' application", please check the error description on the error page.

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How to Fix "Server Error in '/' Application"

To fix the "server error in '/' application", you can use the following methods.

Fix 1. Restart IIS

  • Click the Start button in the lower left-hand corner and then choose Administrative Tools
  • Click Internet Information Services (IIS) Managerto launch it.
  • In the IIS manager, select the server in the left-hand window pane and then click Restart on the left-hand side.

Fix 2. Update the URL

If the "server error in '/' application" is a 404 error, you just need to correct the URL in the link that triggers this error.

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Fix 3. Add the MIME Type

If a file does not have permissions to be run on the server, you should first check if you are calling the correct file name. For example, is there a typo in the file extension? If the file name is correct, then you may need to add the MIME type of the file extension to the server.

If don't know the MIME Type of a file extension, you can search it online. Then, you can add the MIME type in the IIS Manager through the following steps:

  • Open the IIS Manager
  • In the left-hand window panel, expand your server > Sites > Default Web Site.
  • In the central pane, double-click MIME Types.
  • Under the Actions column on the right, click .. button. This will open a window.
  • In the pop-up window, fill in the File name extensionand MIME Type, and then click OK.

Fix 4. Verify the .NET Version

  • Open IIS Manager
  • Expand the server in the left-hand window panel and choose Application Pools.
  • Right-click on an app and choose Basic Settings...
  • In the pop-up window, select the .NET version from the drop-down menu, and then click OKto confirm your choice.

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