My hand brake won’t release in my 2014 RRS. Any ideas????

Depends if you've had any horrible screeching noises or any fault lights on the dash,,, which would point to it being sized which is quite common especially if the rear brakes are not serviced regularly. There have been a few other instances where people have suffered from faulty wiring to the module as I think this runs through the near side rear wheel arch,,,, problems with cables rubbing through.
Has any other work been carried out lately?? 2010 RRS, TDV8
bali Blue / colour coded
side steps / flappy paddles
black perforated leather
22" overfinch
heated everything, TV,fridge ...... now with gold calipers and mud flaps !( black mud flaps that is) !!
Many years ago,,,,, 1955 series 1 landie , sometimes wish I had kept it

I’ve had no noises at all. The car is new to me. I jumped in and I had a amber fault light come on. But I can feel the hand brake is still on if I try and move.

Is this the handbrake fault light?,, a serious problem would give a red light I would have thought, would still be tempted to check the obvious first,,, fuses, switch and wiring if you haven't had any other warning signs. 2010 RRS, TDV8
bali Blue / colour coded
side steps / flappy paddles
black perforated leather
22" overfinch
heated everything, TV,fridge ...... now with gold calipers and mud flaps !( black mud flaps that is) !!
Many years ago,,,,, 1955 series 1 landie , sometimes wish I had kept it

Not sure if it helps but I did manage to drive my RRS for about 30 miles with the handbrake jammed on. Only stopped when someone in the next lane shouted to me that I was on fire!! The I noticed the smoke!
There were no warning lights or anything like that. The system thought it had released but it obviously hadn't released all the way. After it was serviced by my local indie and £150 or so later all was fine. I think they just took it apart and cleaned it all up. Robin
2008 Range Rover Sport TDV8
Gone:
Jaguar S-Type V8 4.2 Sport
MGZTT 190 2.5

My experience, and probably that of most of us here, is with the L320 which as we all know has a central module which operates cables to draw on the shoes inside the drums. My understanding is that the OP's L494 has separate "modules" that work directly on each rear wheel, so no cables to screech.
I think a good local indi is your best bet.

I agree eaters,,, after mine completely crapped itself my indie said dirt was a bit enemy of the EPB system and it was worth having it serviced on a regular basis. Just had it done at the last service,, and for the sake of £60 was stripped cleaned adjusted correctly and a sticky caliper freed off,,,,, beats shelling out £1200+ for new module and discs etc. 2010 RRS, TDV8
bali Blue / colour coded
side steps / flappy paddles
black perforated leather
22" overfinch
heated everything, TV,fridge ...... now with gold calipers and mud flaps !( black mud flaps that is) !!
Many years ago,,,,, 1955 series 1 landie , sometimes wish I had kept it

I'm afraid its the way forward with these beasts. Best to keep on top of issues as they arise, and ideally before they arise!

Now when am I going to sort out my AFS head light issue....  Robin
2008 Range Rover Sport TDV8
Gone:
Jaguar S-Type V8 4.2 Sport
MGZTT 190 2.5

L494 has a totally different system to the L320. L494 system works directly on the disk through a servo on each rear wheel directly applying the pad to the disk, and does not have the old "top hat" brake shoe system fitted to the L320. I notice that a lot of comments above are from L320 owners which have a totally different system. Maybe one of the servo motors has jammed on.

Regards
Barry 2017 Range Rover Sport TDV6 L494 SE Fuji White
2011 Range Rover Sport SDV6 L320 SE Fuji White Loved but GONE
2010 TRAKKA Motorhome Fiat Ducato GONE (What a dud, don't buy one)
2006 Discovery 3 SE TDV6 Automatic Chawton White/Ebony. Loved but GONE
2006 BMW X5 diesel White/Charcoal, Bought new, Gone after 12 years! Was Excellent.
Ex Member Range Rover Club NSW

Whoops - thanks Barryp. I stand informed and corrected.  Robin
2008 Range Rover Sport TDV8
Gone:
Jaguar S-Type V8 4.2 Sport
MGZTT 190 2.5

We learn something everyday  2010 RRS, TDV8
bali Blue / colour coded
side steps / flappy paddles
black perforated leather
22" overfinch
heated everything, TV,fridge ...... now with gold calipers and mud flaps !( black mud flaps that is) !!
Many years ago,,,,, 1955 series 1 landie , sometimes wish I had kept it