Creating a bootable macOS installer errors with ‘dyld: Library not loaded: @executable_path/../Frameworks/IAESD.framework Versions/A/IAESD’
Encountered this very same issue on my MacBook with Yosemite (10.10.5)
sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume

dyld: Library not loaded: @executable_path/../Frameworks/IAESD.framework/Versions/A/IAESD
  Referenced from: /Applications/Install macOS Big Sur.app/Contents/Resources/createinstallmedia
  Reason: no suitable image found.  Did find:
    /Applications/Install macOS Big Sur.app/Contents/Resources/../Frameworks/IAESD.framework/Versions/A/IAESD: mmap() error 1 at address=0x1021F8000, size=0x00008000 segment=__TEXT in Segment::map() mapping /Applications/Install macOS Big Sur.app/Contents/Resources/../Frameworks/IAESD.framework/Versions/A/IAESD
    /Applications/Install macOS Big Sur.app/Contents/Resources/../Frameworks/IAESD.framework/Versions/A/IAESD: mmap() error 1 at address=0x102211000, size=0x00008000 segment=__TEXT in Segment::map() mapping /Applications/Install macOS Big Sur.app/Contents/Resources/../Frameworks/IAESD.framework/Versions/A/IAESD

However the very same command on my newer MacBook with Sierra (10.12.6) just runs fine! I suggest building USB install disks from newer macOS if possible.