Got myself an interessting issue after installing Fedora 29 on an Acer Aspire ES1-731. After start it goes into an reboot loop, stating a cryptic message with phases BootOrder not found and grubx64.efi .
It turned out the Secure Boot has to be modified to allow the GRUB (Fedora Bootloader) to be 'trusted'.
Following the excelent intructions of Krallan on the Acer Community Forum got myself an working system again.
Cool, thanks Krallan!
PS: Press F2 during boot to get into the BIOS