Unreal Engine 5.3 Packaging Failed – "Unknown Error"

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Hi everyone, I’m running into a packaging issue in Unreal Engine 5.3 and could really use some help. When I try to package my project, I get the following message:

PackagingResults: Error: Unknown Error

Here’s what I’ve done so far to try and fix it:

  • Made sure visual studio (2022) is installed and updated, also the C++ development tools are installed.
  • Deleted the Saved, Intermediate, and DerivedDataCache folders.

But the error still keeps showing up without any other explanation. Has anyone come across this before, or know what else I can try?

Thanks a ton in advance!

This is the Outlog Log //

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You should have a look at this post. You could modify the header files, but I would rather recommend to try the solution of Wasabi.in. But the best solution is to install the supported MSVC compiler version 14.34.31933.

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Thank you so much! It worked perfectly. I really appreciate the help!

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