Error in get(as.character(FUN), mode = "function", envir = envir) : object '.' of mode 'function' was not found

tidyverse
2

Without a reproducible example, I can only guess what your problem is based on your syntax errors, my best guess is that you are actually trying to do this

new_project %>%
    filter(Id == "1503960366") %>%
    group_by(ActivityHour) %>% 
    summarise(StepTotal = sum(StepTotal))

If this doesn't solve your problem and you need more specific help, please provide a proper REPRoducible EXample (reprex) illustrating your issue.