Very Senior Member
Same here: From time to time I need to delete the WLAN config on my 3 Samsung tablets and reconnect and then it works like a charm - only using 5 GHz as 2.4 GHz WLAN is too messy in my area.Have the Samsung host forget the network. Then connect as if you never connected to your network. I suspect you are looking at a host that is confused and sending the incorrect security string. This can happen when APs are changed or reconfigured.