In the Netherlands, you may sublet (or sublease) your home if you have permission from the landlord/owner of the living space. You can find this in your rental agreement. If the rental agreement states that this is not allowed, then it is really not allowed. Ask your landlord if an exception can be made. Have this put on paper for your own protection. If there is nothing stated in your rental agreement about subletting, you can also check with your landlord.
If you sublet against the wishes of the landlord (or against the clause in your rental agreement), then this is a reason to terminate the agreement.