I had this issue yesterday too on 64bit UEFI on HP laptop and I selected OpenRC.

I tried installing 2 times with encrypted LVM and I had to boot with grub commands and cryptsetup arg + root argument pointing at LV.
After booting I updated to chimaera and it's now booting, but I have to press enter before grub menu because it shows "no server is specified" and no such device errors. Despite those errors, I can boot Devuan using menu entries now.