Cannot use string variable for path in Resources.Loadall

I need to load assets depending on which character is chosen. If I use a variable string (path), Resources.LoadAll does not work. If the string is placed directly in the method where the variable "path" is then it works.

Does not work: public void FindMaterials() { string path = "Models / Gail / Materials"; materialsThatHaveBeenFound = (Material[])Resources.LoadAll(path, typeof(Material)).Cast().ToArray(); }

Works: public void FindMaterials() { materialsThatHaveBeenFound = (Material[])Resources.LoadAll("Models / Gail / Materials", typeof(Material)).Cast().ToArray(); }