SkyQ keeps saying incorrect wifi password

[Amymcg26]

So, the other day everything was fine...

My SkyQ box was connected to my talktalk router via wifi and had been for years. Then i got a message i wasn't connected to the network on the tv. Tried forgetting and reconnecting but now everytime i enter the correct wifi router password my skyQ box says theres a problem and to make sure the password is correct. 

I have restarted the box and router with no luck 

[Amymcg26]

for extra info, i can connect via ethernet but this isn't ideal