Abstract type "..." must resolve to an Object type at runtime for field ".."

Abstract type "PageInformation" must resolve to an Object type at runtime for field "UserPage.pageContent". Either the "PageInformation" type should provide a "resolveType" function or each possible type should provide an "isTypeOf" function.

i got some error about this but i can’t fix, can anyone help me to solve this?

here is my schemas

type Query{
# for only admin
filterUser(filterModel: UserFilterModel, pageable: Pageable!): UserPage!
}

type UserPage {
edges: [UserEdge!]
pageContent: PageInformation!
}
type UserEdge {
cursor: String
node: User!
}
interface PageInformation{
page: Int!
perPage: Int!
totalElements: Int!
numberOfElements: Int!
totalPages: Int!
}