I lose connection when I try to manage my Deco via web interface. - I login with the password - The web interface appears - And after a couple of seconds it disconnects and shows the login again This

I installed 3 TPLink Deco X1500 Mesh devices on my house and in System log there are these following 3 lines repeated many times every about 20 seconds: client_mgmt: can not parse json_obj client_mgmt