My secure folder won't open. It keeps crashing on my S21 ultra. Then it says this (picture below)
When I got the phone it was rooted. Could this be a contributing factor?
My smart view doesn't work either.
Yes. Secure folder, Samsung pass, and some other Samsung apps won't work properly or won't work at all on a rooted device because those apps have detected an unauthorised software modification. Rooting also voids the warranty of the device and makes your device less secure.