I made a EFI partition (192 MB) and still got this bug in a 18.04
installer.
** Changed in: grub-installer (Ubuntu)
Status: Invalid => New
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https://bugs.launchpad.net/bugs/1683643
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: grub-installer (Ubuntu)
Status: New => Confirmed
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You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1683643
Your disk is currently partitioned to boot in bios mode, but you booted
the installer in EFI mode. A warning message prompted you that this
could be a problem and recommended performing a bios mode install
instead, but you chose not to. You either need to perform the bios mode
install, or
