Rooting again after installing LineageOS?

After following the following steps: - rooting a motorola g3, - installing TWRP - wiping the phone (without micro-sd present) with TWRP - installing lineageOS - wiping the phone (without micro-sd present) with TWRP - Installing SlimOS - wiping the phone (without micro-sd present) with TWRP - Installing LineageOS - Installing Root checker basic - Finding it does not have proper root acces - Rebooting to fastboot>recovery>TWRP>Install - Installing http://forum.xda-developers.com/attachment.php?attachmentid=3655401&d=1456122222 (as linked specifically for the Moto G 3 2015 generation here: https://motog5.net/unlock-bootloader-install-twrp-root-moto-g3/)* - Rebooting, - checking Root checker basic - Finding it does not have proper root access - Noticing this explanation: https://duckduckgo.com/?q=root+lineage&atb=v119-6&iax=videos&ia=videos&iai=L8rwPV5ZhhA - enabling in debugging mode: - Root access for ADB and All apps - checking Root checker basic - Finding it does not have proper root access - Reboot in fastmode>TWRP>Install the supersu file - Reboot check in Root check basic whether root has been obtained, root has not been obtained. - Root access for ADB and All apps - checking Root checker basic - Finding it does not have proper root access - Reboot in fastmode>TWRP>Install the supersu file - It does not give a red error bar but it reads: > Boot image patcher > ************************** > - Finding boot image > --- Boot image:/ /dev/block/mmcblk0p31 > - Extracting ramdisk > - Decrompressing ramdisk > - Checking Patch status > - Creating Backup > - Patching sepolicy > --- Failure, aborting > ********************************** > Important notice > ********************************** > If TWRP offers to install SuperSU do *NOT* Let it! > ********************************** I thought perhaps the supersu file needs to be changed since now it is for a LineageOS in stead of for the MOTO G3 2015 edition stock android, so I tried the following 3 files as well: From: https://www.lineageosrom.com/2016/12/how-to-enable-root-in-lineage-os-using.html TO: https://www.lineageosrom.com/2017/01/download-supersuzp-and-su-removalzip.html To: https://download.lineageos.org/extras 1. https://mirrorbits.lineageos.org/su/addonsu-15.1-arm-signed.zip 2. https://mirrorbits.lineageos.org/su/addonsu-15.1-arm64-signed.zip 3. https://mirrorbits.lineageos.org/su/addonsu-15.1-x86-signed.zip Only the 3d did not give a red error. So as much of a trivial challenge it may appear to be, I was curious if anyone can point out which mistake I am making in trying to give the device root-access again. Other suggestions are welcome as well! *Note, this was also the file that allowed me to root it the first time.