Gonna comment and say thanks for this.
My mom's switch is banned and has CFW on sysNAND. When I updated to 16.1.0, I updated atmosphère, the sigpatches, etc. and for 2 days I couldn't get sigptaches to actually work, even after completely formatting the SD card and starting over. The same guides worked perfectly fine on my Switch, they're both Erista on 16.1.0, with the same sigpatches etc. Even tried a brand new SD card.
Tried the GBATemp sigpatches, the coomer sigpatches (Rentry guide) and nothing worked. I know my way around Switch hacking so I tried a bunch of things over the course of those 2 days.
As a last resort, I used your guide with a freshly formatted SD card and now everything works, thank you so much!
Me, a native French speaker reading this thread :