Hi,
I’m trying to install /e/ on my Xiaomi Mi A1 (Android 7.1.2, build number N2G47H.7.12.19) according to the instructions. However, none of the TWRP versions from https://dl.twrp.me/tissot/ boot.
Did you try booting into recovery? this page, the /e/ foundation instructions, shows the boot modes at the bottom: Recovery, Power+VolUp. Hope that works…