Hi there,
Yep , eliminate the basics first. I’ll assume you tried the port number as well p"28"
Here’s what I used for both demo’s Nrf52840 & ESP32C3
5/5/23 here too!
I would take a stab at setting the SPI pins MOSI , MISO, Sclk. and print them to the serial port first to see what they are currently set to.
Serial.println("--------------");
Serial.println(SS);
Serial.println(MOSI); // master out, slave in
Serial.println(MISO); // master in, slave out
Serial.println(SCK); // clock
Serial.println("--------------");
Post the results.
HTH
GL 
PJ 