I've got my parents a booster. I've set it up fine and can see the wi-fi with the EXT at the end but when I try to connect to it on my mobile I get Authentication Problem.
I've tried the same, trying to connect the Firestick and I get the same message. I've also tried the Router password too and that is the same.
I can connect on WiFi normally to the wi-fi without the EXT fine, albeit with a poor signal! I've logged on to the router itself and the security mode is WPA-PSK and WPA2 with new devices allowed.
What am I doing wrong? I've tried numerous times to set it up and the signal is great on the extender I just can't connect to it!