NODEMCU + FastLED on Pin D0/GPIO16

I'm running several strings of NeoPixels on a NODEMCU. All are working perfectly, except I can't get anything to work on pin D0/GPIO16. All other pins work fine. Is there some reason FastLED will NOT work on D0? I can't find any documentation on that, but it sure doesn't seem to work.

Regards, Ray L.

I ran all of my Christmas lights on a Wemos D1 Mini using D0/GPIO16

Show your code.