Arduino 1.8.8 , FastLED current master, the LED strip is working fine with this library on a Atmega328:

On a BluePill , STM32F103C8 , with STM32duino bootloader, I tried the example "ColorPalette"
changed only "#define LED_PIN"

to 17 as "PA7" is not recognized
then tried PB5 , (recognized).
no LED activity.