Error in `check_data_with_params(x, params)`: cf_start not in time attribute/vector!

expect_equal(fr_day$day[fr_day$model == "Ad"], "2020-08-11") # should be 2020-08-12, but we can explain the difference with slightly different input than in Dr. Halbigs study
x <- load_test("hour")[1:48, c("date", "tmean")]

# should be 2020-08-12, but we can explain the difference with slightly different input than in Dr. Halbigs study