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Your project has a file called Package.appsmanifest, but it needs a file named Package.appxmanifest to work. Without it, Windows can’t build the app package.
Publishing a .NET MAUI app fails with error message "You must include a valid app package manifest file named AppxManifest.xml in the source."
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(268.8, 91%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAS%3C/text%3E%3C/svg%3E)
Andreas Stavropoulos
0
Reputation points
I'm trying to publish a .NET MAUI app.
The source code contains a "Package.appxmanifest" file.
When I try to publish, it fails with the following error messages:
- You must include a valid app package manifest file named AppxManifest.xml in the source.
- 0x80080203 - The specified package format is not valid: The file is not a valid app package because it is missing a required footprint file.
- Package creation failed.
What could be wrong?
I'm using Visual Studio 2022 version 17.14.6
Developer technologies | Universal Windows Platform (UWP)
{count} votes
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(105.60000000000001, 86%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHV%3C/text%3E%3C/svg%3E)
Harry Vo (WICLOUD CORPORATION) 80 Reputation points Microsoft External Staff2025-07-04T02:58:56.7433333+00:00 Thanks for your question! It looks like your topic is related to .NET MAUI, but the post is currently tagged with UWP. To help the right audience find and answer your question, could you please update the tag to .NET MAUI instead?
Thank you!
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(112.00000000000001, 32%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPH%3C/text%3E%3C/svg%3E)
Patricia Horne 0 Reputation points2025-07-03T10:00:34.7+00:00 -
Andreas Stavropoulos 0 Reputation points
2025-07-03T10:05:41.38+00:00 That was a typo, it contains a
Package.appxmanifest -
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