Sounds like not enough water. Look through the hole in lid after 2 minutes, and if the dough is not clumping together add more water,
. A tablespoon at a time.
During summer or if using wholemeal flour I add at least 2 tablespoons more water.
You may then need to knead for an extra minute.
It is better to have a wetter dough than a too dry one.
Good luck musicalmummy.
Keep us posted and keep asking for help.