Fatal error: sys/_stdint.h: No such file or directory

I am trying to compile stm32 arduino code for a open source eeg ads1299 project in kicad.

I am having issues its not seeing some c library?
I think I installed the libraries needed?
I did find the json library 6.... in the arduino form was used to compile a due project.

fatal error: sys/_stdint.h: No such file or directory

source github
[GitHub - CGrassin/biosignals: Board for the acquisition of bio-potentials (EMG, ECG, EEG, etc.).](https://arduino stm32 ads1299 biosignals eeg firmware github)

error message

Arduino: 1.8.19 (Windows 8.1), Board: "Generic STM32F103C series, STM32F103C8 (20k RAM. 64k Flash), STM32duino bootloader, 72Mhz (Normal), Smallest (default)"





















In file included from C:\Users\User\Desktop\biosignals-main\Firmware_BioSignals\openbci.h:9:0,

Multiple libraries were found for "SdFat.h"

 Used: C:\Users\User\Documents\Arduino\libraries\SdFat

                 from C:\Users\User\Desktop\biosignals-main\Firmware_BioSignals\Firmware_BioSignals.ino:3:

 Not used: C:\Users\User\Documents\Arduino\libraries\SdFat_-_Adafruit_Fork

ads1x9x.h:1:25: fatal error: sys/_stdint.h: No such file or directory

 #include <sys/_stdint.h>

                         ^

compilation terminated.

exit status 1

sys/_stdint.h: No such file or directory



This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

I commented the error line out and added
#include <stdint.h>
im not shure if that solved it because I am getting another error.