Could not set proper VECT_TAB_OFFSET in a case with a bootloader.
Compiling .pio/build/genericSTM32F103C8/src/display.o
/home/marat/.platformio/packages/framework-cmsis-stm32f1/Source/Templates/system_stm32f1xx.c:95:0: warning: "VECT_TAB_OFFSET" redefined
#define VECT_TAB_OFFSET 0x00000000U /*!< Vector Table base offset field.
<command-line>:0:0: note: this is the location of the previous definition
Could not set proper VECT_TAB_OFFSET in a case with a bootloader.
A possible solution in the attachment:
fix-flash-offset.zip