Following the "Samsung (System-as-root)"* instructions, I cannot get Magisk to patch lineage-17.1-20210304-nightly-jfltexx-signed.zip for a Samsung Galaxy S4 (SGH-M919). Magisk throws an "unsupported/unknown image format" error.
*since Magik says SAR=yes
Is there a way to root a Samsung Galaxy S4 running LineageOS 17.1?
cf. "root on 17.1?" r/LineageOS