Throw me: Error in summarize_impl (.data, dots): Evaluation error: object 'Mean.AUC' not found

When I run group_by (my_data, H)% >% summarize (count = n (), mean = mean (Mean.AUC, na.rm = TRUE), sd = sd (Mean.AUC, na.rm = TRUE)) throws me the error mentioned earlier.

I have two columns, the "x" is a categorical factor with two levels and in "and" I have the values are numeric.