MM-45991 Wrap errors (#20785)

model/upload_session.go

@@ -79,7 +79,7 @@ func (us *UploadSession) IsValid() *AppError {
 	}
 
 	if err := us.Type.IsValid(); err != nil {
-		return NewAppError("UploadSession.IsValid", "model.upload_session.is_valid.type.app_error", nil, err.Error(), http.StatusBadRequest)
+		return NewAppError("UploadSession.IsValid", "model.upload_session.is_valid.type.app_error", nil, "", http.StatusBadRequest).Wrap(err)
 	}
 
 	if !IsValidId(us.UserId) && us.UserId != UploadNoUserID {