Sketch won't run

Using Arduino Project Guidance
7

After I disconnected the DHT sensor and buttons from the Arduino, I uploaded the MD_Parola,/ Parola_Scrolling, but that does not show anything on the display.

And in a serial monitor it shows:
17:30:50.011 -> ⸮⸮⸮⸮⸮⸮0⸮i8E2#

This is at the top of the sketch

#if DEBUG
#define PRINT(s, x) { Serial.print(F(s)); Serial.print(x); }
#define PRINTS(x) Serial.print(F(x))
#define PRINTX(x) Serial.println(x, HEX)
#else