Compilation error - ICE80: The 64BitComponent ... uses 32BitDirectory

I want a 64-bit installer (as per my Release configuration), so I used <Directory Id="ProgramFiles64Folder"> instead of ProgramFilesFolder as part of the target installation path.

This article provides more information: How to: Create the Windows Installer Package for 64-bit Client Computers

You can also set Win64="no" in the <Component /> tag of the components which are not 64-bit.

But I can confirm you can ignore this.