Array to string conversion, help!

[karelbyte]

Hello, thanks for this excellent library, I have a detail when adding a media, it returns an error "Array to string conversion" in the method *** toMediaCollection ($ collection); *** I already checked that $ collection is a string that contains the name of the collection that I want to define, so that error is very strange to me, I have spatie media library 9, php 7.4 and laravel 8, any help or clue that may be happening?

$ media = $ model-> addMedia ($ file)

                   -> sanitizingFileName (function ($ fileName) {

                       return strtolower (str_replace (['#', '/', '\\', ''], '-', $ fileName));

                   })

                  -> withCustomProperties ($ customProperties)

                  **-> toMediaCollection ($ collection);**