I have the same issue. It seems to me that Tp link doesn't have appropriate support. So, the only reasonable solution is to switch from Tp-link to another router producer.

Could be cause of the update. Could you just inform us if the future of Parental Control works on Asus so that we can switch to them? Thank you

Dear Mr Do not know whay you locked Thread abour problems with Parental control for Archer C1200. Is there any advise or we should change device with other more reliable? Thank you in advance Fuad