![]() If you get this text, you've find the root of your problem. The Module DLL C:\WINDOWS\system32\inetsrv\rewrite.dll failed to load. Open one of them and check if the error message looks like the following: Once you get there, check the Windows Registry > Application tab and look for Origin IIS-W3SVC-WP and ID event 2280 event logs: chances are you'll find a lot of them. To see if that's what happened to your system, open the Event Viewer from Control Panel > Administrative Tools > Event Viewer. This kind of issue is most frequent following a system upgrade, usually from Windows 8.1 to Windows 10, due to the fact that the installation process can occasionally break the IIS URL Rewrite module 2.0. Try again to run your web application using Visual Studio's debug mode and check if the problem is gone.Īgain, if the error is still there you need to check the DefaultAppPool status: if it's automatically stopping again, keep reading.Restart the IIS instance by opening a command prompt with administrative rights and typing iisreset.Restart the Application Pool from IIS Manager > Application Pool.Set up the missing permissions accordingly. ![]() Ensure that either IIS_IUSRS and IUSR (or the user impersonated by the Application Pool if there's a specific one) do have read and execute rights, otherwise: First thing to do is to check if your Web Application folder has sufficient permissions to allow access to the Application Pool. This issue has been experienced by many users and has been reported frequently (such as in this thread) in the IIS official forum. Let's see how we can handle either of them. URL Rewrite Module Broken, an issue which is often related to a system upgrade (for example, from Windows 8 or 8.1 o to Windows 10).Missing permissions in the Web Application folder.The most common causes preventing the Application Pools to behave like that are usually two: If that's so, you're done: otherwise, go back to the IIS Manager > Application Pools panel and check again the DefaultAppPool status: if it's stopped again, it means that something on your system causes the Application Pool crash which you need to find out. As soon as you do that, perform an iisreset, wait for the reset and then try again the debug with Visual Studio to see if the problem is gone. In order to do that, go to Control Panel > Amdministrative Tools > IIS Manager > Application Pools, then click on the DefaultAppPool with the right mouse button and choose Start. The cause has almost always something to do with the Application Pool used by your web application - usually the DefaultAppPool, unless you've chosen otherwise - which stopped working for no apparent reason.įirst thing you can do is to try to manually restart it. Luckily enough, the issue is fairly known to ASP.NET developers thanks to many threads on IT resources websites such as StackOverflow. ![]() If you've recently upgraded your system to Windows 10 I strongly suggest to jump down to the URL Rewrite Module Broken paragraph and follow the advices below: otherwise, keep reading.ĭespite what the error message says, starting the project without debugging won't give you more informations. More information may be available by starting the project without debugging. Unable to start debugging on the web server. ![]() If you've stumbled upon this post you most likely experienced the following error message when you tried to run your web application in debug mode: ![]()
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