The following error is for any board not just for Ci20 , i tried earlier versions of genimage also but haven't had much of luck 


>>>   Executing post-image script support/scripts/genimage.sh
board/ci20/genimage.cfg:29: no sub-section title/index for 'config'
INFO: cmd: "mkdir -p "/home/nirajtummala/buildroot/output/build/genimage.tmp"" (stderr):
INFO: cmd: "rm -rf "/home/nirajtummala/buildroot/output/build/genimage.tmp"/*" (stderr):
INFO: cmd: "mkdir -p "/home/nirajtummala/buildroot/output/build/genimage.tmp"" (stderr):
INFO: cmd: "cp -a "/tmp/tmp.tU65pvVkfR" "/home/nirajtummala/buildroot/output/build/genimage.tmp/root"" (stderr):
INFO: cmd: "find '/home/nirajtummala/buildroot/output/build/genimage.tmp/root' -depth -type d -printf '%P\0' | xargs -0 -I {} touch -r '/tmp/tmp.tU65pvVkfR/{}' '/home/nirajtummala/buildroot/output/build/genimage.tmp/root/{}'" (stderr):
INFO: cmd: "mkdir -p "/home/nirajtummala/buildroot/output/images"" (stderr):
INFO: hdimage(sdcard.img): adding partition 'uboot-spl' from 'u-boot-spl.bin' ...
INFO: hdimage(sdcard.img): adding partition 'uboot' from 'u-boot.img' ...
INFO: hdimage(sdcard.img): adding partition 'uboot-env' from 'uboot-env.bin' ...
INFO: hdimage(sdcard.img): adding partition 'rootfs' (in MBR) from 'rootfs.ext4' ...
INFO: hdimage(sdcard.img): writing MBR