variantsh_error

    4 | #include "variant.h"
      |          ^~~~~~~~~~~
compilation terminated.
In file included from C:\Users\dar\.platformio\packages\framework-arduinoststm32@4.10900.200819\system\Drivers\STM32F0xx_HAL_Driver\Inc/stm32f0xx_hal.h:30,
                 from C:\Users\dar\.platformio\packages\framework-arduinoststm32@4.10900.200819\system\Drivers\CMSIS\Device\ST\STM32F0xx\Include/stm32f0xx.h:206,
                 from C:\Users\dar\.platformio\packages\framework-arduinoststm32@4.10900.200819\cores\arduino\stm32/stm32_def.h:26,
                 from C:\Users\dar\.platformio\packages\framework-arduinoststm32@4.10900.200819\cores\arduino\stm32/clock.h:43,
                 from C:\Users\dar\.platformio\packages\framework-arduinoststm32@4.10900.200819\cores\arduino/wiring_time.h:23,
                 from C:\Users\dar\.platformio\packages\framework-arduinoststm32@4.10900.200819\cores\arduino/wiring.h:38,
                 from C:\Users\dar\.platformio\packages\framework-arduinoststm32@4.10900.200819\cores\arduino/Arduino.h:36,
                 from C:\Users\dar\.platformio\packages\framework-arduinoststm32@4.10900.200819\cores\arduino\IPAddress.cpp:20:
C:\Users\dar\.platformio\packages\framework-arduinoststm32@4.10900.200819\system\STM32F0xx/stm32f0xx_hal_conf.h:4:10: fatal error: variant.h:
No such file or directory