Can not pass

[hzhh110]

len = length;
memcpy(buffer, data, length);
buffer[length] = 0;

Can not pass

[AcuarioCat]

You need to update the copy code in the .cpp file to the following:
String& ByteString::copy(const void* data, unsigned int length) { if (!reserve(length)) { invalidate(); return *this; } setLen(length); memmove_P(wbuffer(), data, length + 1); return *this; }