Can't upload a program

After some trouble about missing includes:
> C:\Users\xxxx\Documents\Arduino\libraries\ArduinoDaisySP-master\src/DaisyDSP.h:4:10: fatal error: utility/DaisySP/daisysp.h: No such file or directory
>
> 4 | #include “utility/DaisySP/daisysp.h”
>
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> compilation terminated.
I could build the example (by copying the missing files from another zip file). After rebooting I’m getting this upload error:
> -------------------------------------------------------------------
> STM32CubeProgrammer v2.4.0
> -------------------------------------------------------------------
>
>
>
> USB speed : Full Speed (12MBit/s)
> Manuf. ID : STMicroelectronics
> Product ID : DFU in FS Mode
> SN : 200364500000
> FW version : 0x011a
> Device ID : 0x0450
> Device name : STM32H7xx
> Flash size : 2 MBytes (default)
> Device type : MCU
> Device CPU : Cortex-M7
>
>
>
> Memory Programming …
> Opening and parsing file: Blink.ino.bin
> File : Blink.ino.bin
> Size : 29276 Bytes
> Address : 0x08000000
>
>
> Erasing memory corresponding to segment 0:
> Erasing internal memory sector 0
> erasing sector 0000 @: 0x08000000 done
> Download in Progress:
>
>
> File download complete
> Time elapsed during download operation: 00:00:01.150
>
> RUNNING Program …
> Address: : 0x8000000
> Error: Start operation failed

What’s happening here (using Arduino IDE)? Also: do I really need to boot/reset every-time before uploading?
Update: although getting the error, the program actually runs. Strange!