Error when querying api created in R with plumber

I have created a ppi in plumber, when I query this api directly in the browser I can see the data, but when I use the GET () function I get the following error:

  

Error in prettyNum (.Internal (format (x, trim, digits, nsmall, width,   3L,: invalid 'trim' argument

Would you have any solutions to my problem? Thank you.