How to solve this problem?

Using Arduino Programming Questions
1

Tone.cpp.o (symbol from plugin): In function `timer0_pin_port':

(.text+0x0): multiple definition of `__vector_7'

libraries\IRremote\IRremote.cpp.o (symbol from plugin):(.text+0x0): first defined here

collect2.exe: error: ld returned 1 exit status

Multiple libraries were found for "IRremote.h"

Used: C:\Users\ABC\Desktop\arduino-1.8.10\libraries\libraries\IRremote

Multiple libraries were found for "Servo.h"

Used: C:\Users\ABC\Desktop\arduino-1.8.10\libraries\Servo
exit status 1

Error compiling for board Arduino/Genuino Uno.

I can't find the problem in this case, please help me. thank you very much.

2

IRremote and tone() use the same timer interrupt so they can't be used together. There is a third-party 'tone' library you can install that allows you to select a different timer.