Photos are not very useful (also not a good thing to do here). It seems you are trying to convert your entire dataframe to numeric, but the as.numeric() function doesn't work that way, it takes vectors as input not dataframes, also integers are already numerics so very likely your problem has to do with something else like missing values (NAs) in your data.
Please try to read the reprex guide a little more carefully and make a reprex so we can better help you.