Ok so im having the same problem on my galaxy a5 2017 i tap an hold the the icon for 5 to 10 seconds but the icon doesnt spin i have the animation at X1.00 i have developer options enabled ive even tried shuting developer options off turn animation to X0.50 ive tried changing the animation an resetting my phone ive done everything I could find researching troubleshooting options i have read that samsung HTC an moto have blocked this feature out an that system ui tuner can not be used on these company's devices can anyone plz help oh also i had factory reset my phone an i used to be able to do the dark an light theme setting on my phone before the nuget update but after I factory rest my phone this option disappeared also nuget has been acting funny an there is no way to down grade os an no way to reinstall nuget without rooting my phone but I don't want to void my warranty so i can't root at this current moment in time