For some weird reason, the following code doesn't compile. I get a "stray '302円' in program" error around volatile unsigned int encoderPos = 0;, and I have no idea what the issue is. I've been trying to figure this out for over 40min, and nothing works. It doesn't make any sense 😭

#include <U8g2lib.h>
#include <SPI.h>
//Pin definitions:
const int control_PWM = A3; //PWM output for the delay 
const int btn_1 = 1; //Button for mode 1
const int btn_2 = 4; //Button for mode 2
const int btn_3 = 5; //Button for mode 3
const int r_A = 2; //Rotary encoder A's data
const int r_B = 3; //Rotary encoder A's data
const int r_SW = 0; //Rotary encoder's button data
const int oled_CLK = 9; //SPI cloack
const int oled_MOSI = 8; //MOSI pin
const int oled_CS = 7; //Chip Select pin
const int oled_DC = 6; //OLED's D/C pin
U8G2_SH1106_128X64_NONAME_F_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8);
int mode = 1; //1: RGB, 2: HSL, 3: Distance control
int value_selection = 1; //Actual value selectrion
int value1 = 0; //red in mode 1; tint in mode 2
int value2 = 0; ////green in mode 1; saturation in mode 2
int value3 = 0; //blue in mode 1; luminosity in mode 2
volatile unsigned int encoderPos = 0; // rotary encoder's current position
unsigned int lastReportedPos = 1; // rotary encoder's previous position
static boolean rotating=false; // is the encoder activity status
// interrupter variables
boolean A_set = false; 
boolean B_set = false;
boolean A_change = false;
boolean B_change= false;
void setup() {
}
void loop() {
}