Try renaming the switch folder, and use the bare minimal plugins and without overlays, with the atmosphere version updated for you version.
The issue I once had was with sys-clk.
I had a similar issue, try using a clean install with the bare minimum plugins and without overlays, in my case the issue was caused by: sys-clk
Hope you already solved it or it helps someone with this error.
I tried a lot o things this works like a charm and has a lot of things I don't know can do it, hopes one day we can talk to ask you for advice. For this pack thanks a lot.
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi