Sounds like it might be some variation on the first heads up item: "When you initially install LineageOS, be sure you flash the gapps package with your ROM. If you boot your ROM, then go back and try to flash gapps after, you're gonna have a bad time"Ok fine but I have a new problem. After installing the latest version of lineageos 15.1 from 10-17-2021 as well as the opengapps nano package my phone goes to the setup screen where you put in the wifi password and it says its updating things and it gets stuck there. The last time I let it sit for an hour while it was claiming to update things. It gave me the option to update via cellular so I tried that as well but it just hangs forever. Also while this is going on, some of the gapps packages are erroring out? I followed the instructions to a T for the installation, and am using the latest version of twrp 3-5-2-9-0. yet the same thing happens if i use mindthegapps or opengapps. If I skip the gapps entirely when installing from twrp then los 15.1 starts and works fine. Any ideas?
Maybe try clean flashing everything? I really don't know