Compatible with Arduino uno R4?

In member function 'void RGBmatrixPanel::init(uint8_t, uint8_t, uint8_t, uint8_t, uint8_t, uint8_t, uint8_t, boolean, uint8_t)':
Library/Arduino15/packages/arduino/hardware/renesas_uno/1.5.3/cores/arduino/Arduino.h:75:92: error: cannot convert 'volatile uint16_t* {aka volatile short unsigned int*}' to 'volatile PortType* {aka volatile long unsigned int*}' in assignment
#define portOutputRegister(port) &(((R_PORT0_Type *)IOPORT_PRV_PORT_ADDRESS(port))->PODR)

Start by reproducing the RGBmatrixPanel::init compilation error on an Arduino Uno R4 and read the reported Arduino.h portOutputRegister definition. Compare the library's expected port types with the renesas_uno core; done means the library compiles for the Uno R4 without this conversion error.

Written by the indexing model from the issue text.