Serial monitor in Arduino IDE show it is not clear

Hi all
I use ESP32 CAM
and I use this sample

when upload code and reset module show this error

[E][camera.c:1049] camera_probe(): Detected camera not supported.
[E][camera.c:1249] esp_camera_init(): Camera probe failed with error 0x20004

I for have fix bug use 5v. now, my module connect to WIFI. but in serial monitor not show clear message

(this message)

What can be done to solve this problem?

I should use 5v whith 3v. when use two voltage in serial monitor show clear message