There are times when you get the below error when you try to build UWP package in Microsoft Visual Studio to upload it to the Windows Store with the appx bundle option enabled.
App manifest references the image which does not have a candidate in the main package error in windows
Incase , you get the same error , verify if the images for which the error is shown have the correct scale and rename the suffix accordingly.
If you have set the scale to -400 , try changing the default scale by opening the .csproj in notepad and adding the below entry within the <PropertyGroup> element..
<UapDefaultAssetScale>400</UapDefaultAssetScale>