tags to be a string, number, bigint, or object with a novel `toString` method but found an Array with length %s instead. Browsers treat all child Nodes of tags as Text content and React expects to be able to convert `children` of <title> tags to a single string value which is why Arrays of length greater than 1 are not supported. When using JSX it can be common to combine text nodes and value nodes. For example: <title>hello {nameOfUser}