ESP32 runtime error in 2d array
The ESP32 uses FreeRTOS to run everything, and that includes the Arduino API. Your code is running in a thread of its own ("loopTask"), and that task by default has 8192 bytes of stack allocated to it.

xTaskCreateUniversal(loopTask, "loopTask", 8192, NULL, 1, &amp;loopTaskHandle, CONFIG_ARDUINO_RUNNING_CORE);


You cannot create local variables and other stack data that totals more than 8192 bytes.

Instead you will either have to have the variable as a global variable (or static local) so it gets allocated in the global data segment, or use new or malloc to create it on the heap (and don't forget the corresponding delete or free call when you're done with it).