uart.h File missing

[Katheesh]

ResolveLibrary(PRDC_RS485HD_STM32.h)
  -> candidates: [[email protected]]
/Users/KATHEESKUMAR/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/4.8.3-2014q1/bin/arm-none-eabi-g++ -c -g -Os -Wall -std=gnu++11 -ffunction-sections -fdata-sections -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions -DERROR_LED_PIN=PB9 -w -x c++ -E -CC -mcpu=cortex-m4 -DARDUINO=10819 -DVARIANT_generic_f407v -DARDUINO_ARCH_STM32F4 -DCRYSTAL_FREQ=25 -DLED_BUILTIN=PB9 -DUSB_NC -DUSER_ADDR_ROM=0x08000000 -mthumb -D__STM32F4__ -DSTM32F4 -I/Users/KATHEESKUMAR/Library/Arduino15/packages/stm32duino/hardware/STM32F4/2022.9.26/system/libmaple -I/Users/KATHEESKUMAR/Library/Arduino15/packages/stm32duino/hardware/STM32F4/2022.9.26/cores/maple/libmaple/usbF4 -I/Users/KATHEESKUMAR/Library/Arduino15/packages/stm32duino/hardware/STM32F4/2022.9.26/cores/maple -I/Users/KATHEESKUMAR/Library/Arduino15/packages/stm32duino/hardware/STM32F4/2022.9.26/variants/generic_f407v -I/Users/KATHEESKUMAR/Documents/Arduino/libraries/ModbusMaster/src -I/Users/KATHEESKUMAR/Documents/Arduino/libraries/PRDC_RS485HD_STM32/src /var/folders/17/yqztxmyx22l8v4j35b8pls6c0000gp/T/arduino_build_381346/sketch/STM32F407VET6_RS485.ino.cpp -o /dev/null
Alternatives for uart.h: []
ResolveLibrary(uart.h)
  -> candidates: []
In file included from /Users/KATHEESKUMAR/Documents/Arduino/STM32F407VET6_RS485/STM32F407VET6_RS485.ino:9:0:
/Users/KATHEESKUMAR/Documents/Arduino/libraries/PRDC_RS485HD_STM32/src/PRDC_RS485HD_STM32.h:59:18: fatal error: uart.h: No such file or directory
 #include "uart.h"
                  ^
compilation terminated.