My dog is refusing to go on walks

For context:

– She is 4 years old and leash trained

– Not in any pain

– Does not have any health issues

– Not going any unusual route, been going the same route for years old and I’ve tried going different directions.

She always has enjoyed walks, but this behaviour isn’t necessarily new. She refused to go many times randomly, but it’s been literally every day lately. I’ve tried at different times throughout the day and tried bringing treats. It’s very odd and random behaviour that none of us at home have been able to find an answer for.