我得到这个错误每次我试图加载并使用一个函数的CSV文件。我不知道问题出在哪里
"读取. table（file = file，header = header，sep = sep，quote = quote，："file"必须是字符串或连接"

setwd("/Users/elleryvincent/Desktop/ADFG Black Bear Stable Isotope")

file_path <- "~/Desktop/ADFG Black Bear Stable Isotope/SI_Sp.csv"
mix.filename <- read.table(file_path, header = TRUE, sep = ",", quote = "\"")

source.filename <- read.csv("Sources1_5_2021.csv")
discr.filename <- read.csv("DV_SIDER_omnivore.csv")

n.mod <-10

mix <- vector("list", n.mod)
#Define each model, note the factor or continuous effect

mix[[1]] <- load_mix_data(filename=mix.filename,
                          iso_names=c("C","N"),
                          factors=c(NULL),
                          fac_random=c(NULL),
                          fac_nested=c(NULL),
                          cont_effects=c(NULL))

head(mix.filename)

样本性别年龄等级季节月份年份诱饵日分流skullen skulwid长度宽度1 93 M 2 J S 5 2016是1 9. 9375 4. 8750 14. 8125 2 112 M 7 A S 5 2016否2 11. 3125 6. 5000 17. 8125 3 109 M 7 A S 5 2016否4 11. 5625 6. 1250 17. 6875 4 180 M 5 A S 5 2016是2 10. 1875 5 5. 6250 15. 8125 5 5 226 F 3 SA S 5 2017是2 9. 7500 5. 5625 15. 3125 6 208 M 11 A S 5 2016是1 12. 2500 7. 0625 19. 3125 C N 1 - 22. 214 6. 59 2-20.284 5. 94 3-23.864 5. 04 4-22.964 5. 42 5-25.572 5. 54 6-23.454 7. 03