Welcome to my blog. This is where I sometimes share interesting stories, challenges and breakthroughs from my journey in the realm of software development.

Next/Image "url" parameter is valid but upstream response is invalid

The Windows Subsystem for Linux (WSL) is a convenient way to run Linux distros alongside your Windows 11 installation. In fact, I do most of my day-to-day development inside a WSL2 Ubuntu distro connected to Visual Studio Code.

I am in the process of developing a web application with Next.js 13 and Vercel and I am using the Image Component to load images.

Yesterday, without doing anything out of the ordinary that may cause such an issue, I started seeing the following error in the console for images loaded from the public folder locally:

"url" parameter is valid but upstream response is invalid

Referenced images stopped loading on screen as a result.

I initially went down the rabbit hole of Googling the issue - with no success - before remembering that I am using WSL2. WSL allows you to install and run a Linux distribution (e.g. Ubuntu) on your Windows machine without the overhead of a traditional virtual machine or dualboot setup. WSL as such, deals with file system operations and mapping etc from the Linux distro to the host Windows OS implicitly.

I suspected something got messed up with the WSL file system to cause the error I was seeing because simply removing the .next folder and letting next rebuild things did not help.

So, I restarted WSL with the following command (in Command Prompt (or PowerShell)) where I replaced DISTRO-NAME with the distribution name, in my case Ubuntu:


You can list the distributions your are currently running with the following command:

wsl --list --verbose

Images are now back and the error is no more!