Parking brake electrical actuator failure?

When I park my vehicle, I always engage the parking brake.

When I parked yesterday and was getting ready to drive, the parking brake refused to disengage and I had to use the tool to manually disengage the parking brake. Afterwards I have had no issues with the parking brake.

Is this a just a computer error that happens on these vehicles once in a blue moon or this serious enough I should take this into the dealership?

Vehicle at 45k at the moment.

The reason I ask is because I don't want to be stuck without my vehicle for a week only for them to say they can't figure it out.