I can’t figure out what the problem is with drawing Kaplan Meier curves using ggsurvplot from the survminer and survival package for two-group comparison of survival until day 60. I can create a survival object with Surv() and survdiff(), but when using it inside ggsurvplot(), i get the error: “Error in ggsurvplot(fit_test) : object ‘ggsurv’ not found”.