TTGO T-Deer

I’m talking about the W25Q32FVSS that is soldered on the board…
I tried the SerialFlash library but it seems I’m getting no connection to the flash…

#define FLASH_CS (8)

if (!SerialFlash.begin(FLASH_CS))
{
Serial.println(F(“Unable to access SPI Flash chip”));
}
else
{
FlashTest();
SerialFlash.sleep();
}