Hello there @kam5251!
Investigating through the community, error 0xc06d007e is usually tied to Windows, either right conflicts, or access to missing/corrupted DLL files. Your log does contain calls to plugin “OptiX Denoise”, specifically optixdenoisebase_dll.
In order to fix the problem, there are some options to test:
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First and foremost, please make sure your GPU drivers and Runtime Redistributables are up to date
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Confirm the plugin is actually present in your system, via going to Engine/Plugins/Marketplace/OptiXDenoise/Binaries/Win64/ and checking for files like optix.7.dll. If absent, please get the latest version from NVIDIA OptiX™ Ray Tracing Engine | NVIDIA Developer
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Perform a clear cache, via deleting folders Intermediate and Saved folders from project
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Remove and re-add the OptiX Denoise plugin from Engine. In case it’s not needed for the pack step, leave it disabled
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After completing all steps, try to re-pack, with UE open using admin rights, and temporary pausing any antivirus active in your system