Simple error: Debounce.h: No such file or directory But the file exists

Forewarning, I am very new to coding so this is probably incredibly simple.

#include "Debounce.h" // error, No such file or directory

void setup() {
  ButtonInitialize()
  Serial.begin(9600);

}
void loop() {
  // put your main code here, to run repeatedly:
  switch(ButtonNextState(digitalRead(4)) {
    case 1:
      Serial.print(1);

    case 2:
      Serial.print(2);
  }
  break;
}

My Debounce.h code is running smoothly, and does in fact have a file, therefore I'm confused as to why the run code is unable to see it

Were is Debounce.h file located on your hard drive and where is the current sketch located?

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