Error compiling my esp6288 with fingerprinte dy05

Projects Programming
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C:\Users\hantu_ganteng\Downloads\BiomertricAttendance-System-Using-Esp8266-main\BiomertricAttendance-System-Using-Esp8266-main\Code\Code.ino: In function 'uint8_t deleteFingerprint(int)':
C:\Users\hantu_ganteng\Downloads\BiomertricAttendance-System-Using-Esp8266-main\BiomertricAttendance-System-Using-Esp8266-main\Code\Code.ino:689:20: error: control reaches end of non-void function [-Werror=return-type]
  689 |     display.display();
      |     ~~~~~~~~~~~~~~~^~
C:\Users\hantu_ganteng\Downloads\BiomertricAttendance-System-Using-Esp8266-main\BiomertricAttendance-System-Using-Esp8266-main\Code\Code.ino: In function 'uint8_t getFingerprintEnroll()':
C:\Users\hantu_ganteng\Downloads\BiomertricAttendance-System-Using-Esp8266-main\BiomertricAttendance-System-Using-Esp8266-main\Code\Code.ino:918:18: error: control reaches end of non-void function [-Werror=return-type]
  918 |     confirmAdding();
      |     ~~~~~~~~~~~~~^~
cc1plus.exe: some warnings being treated as errors

exit status 1

Compilation error: control reaches end of non-void function [-Werror=return-type]
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