Boot device not found

[Anas Mohammed1]

I have hp laptop core i5 6th generation and i wanted to convert the partition from mbr to gpt , i did it by minutool partition wizard and after restart in bios settings i disabled the legacy support and enabled the secure boot and changed the boot mood to uefi and still this message error "boot device not found". I get help from youtube and other resources but nothing useful , ask for help and thanks.

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