Flashed addonsu-arm-signed.zip on LineageOS, still no root I just installed LineageOS 14.1 using TWRP.

Then, following this guide I downloaded addonsu-arm-signed.zip to my SD card and installed it, also using TWRP.

PROBLEM: Then I installed Titanium Backup from Play Store, an got this message:



Is there a mistake in my procedure?
Is there a missing step?
Go to Settings.
Click on About phone and then tap 7 times on the Build number.
Navigate back, open Developer Options.
Tap Root Access.
Select Apps or Apps and ADB.


Now you have root and Titanium Backup finds it: