If anyone is trying to use manifoldjs or pwabuilder and are having issues, here is a work around.
First, just don't.
manifoldjs -l debug -p edgeextension -m <MANIFEST-LOCATION>.json
Update generated appxmanifest.xml. Values are found in partner center.
<Identity
Name="<NAME>"
Publisher="<PUBLISHER>"
Version="0.1.0.0" />
<Properties>
<DisplayName>DISPLAY-NAME</DisplayName>
<PublisherDisplayName>PUBLISHER-NAME</PublisherDisplayName>
<Logo>Assets\StoreLogo.png</Logo>
</Properties>
Update logos found in Assets folder.
Run CMD as admin, run command below
MakeAppx pack /d <MANIFEST FOLDER PATH> /p <APPX LOCATION>
ex: C:\Program Files (x86)\Windows Kits\10\App Certification Kit\makeappx.exe" pack /d "manifest" /p "package\mypackage.appx"
I hope this helps someone.