Try adding a dummy return value to following function in IS31FL3733.cpp or better yet, make it a void :

uint8_t IS31FL3733::set_page(uint8_t page)
{
write_reg(0xFE, 0xC5);
write_reg(0xFD, page);
}

I had this exact same problem after moving to 2.0.11 ESP32 Arduino.

See https://esp32.com ...

You can debug the backtrace. https://github.com/espressif/arduino-esp32#decoding-exceptions
If you roll back to the version of arduino-esp32 you originally programmed the code in, it is likely to work. You can see the branch dates at https://github.com/espressif/arduino-esp32/releases


After ...

Try adding a dummy return value to following function in IS31FL3733.cpp or better yet, make it a void :

uint8_t IS31FL3733::set_page(uint8_t page)
{
write_reg(0xFE, 0xC5);
write_reg(0xFD, page);
}

I had this exact same problem after moving to 2.0.11 ESP32 Arduino.

See https://esp32.com ...

You can debug the backtrace. https://github.com/espressif/arduino-esp32#decoding-exceptions
If you roll back to the version of arduino-esp32 you originally programmed the code in, it is likely to work. You can see the branch dates at https://github.com/espressif/arduino-esp32/releases


Thank you ...

I have a question about the operation of ESP32 after uploading code in the Arduino IDE environment.
This problem has been bothering me for several weeks.

Let me first describe my environment:
OS version: Windows 10 Pro 22H2 (19045.3324)
Arduino version: 1.8.13
Board Manager ESP32 version: 2.0.13 ...