R Error: '$ operator is invalid for atomic vectors' - p_nested_layout$t

This error occurs because the variable 'p_both_layout' is not a list or a data frame, but rather an atomic vector. The '$' operator can only be used on lists or data frames to access their named elements.

To fix this error, you may need to create 'p_both_layout' as a list or a data frame, or use a different method to access its elements.