Displaying LDR Data on a 1 Digit 7 Segment Display

Hopefully this isn't the wrong part of the forum to ask about my problem - I hardly use it.
As of a few days ago my serial port (it seems) has been acting up: before, I could attach an LDR (with 10k ohm voltage divider) with no problem and see the light level in the serial monitor with some basic code. Ever since I tried making this circuit, it hasn't worked properly and when I am sure everything is properly connected the serial monitor just reads 0. I'm thinking that it's a communication problem between the board and the computer as when I try a simple LDR program on another board nothing comes up on the serial monitor, though that wouldn't explain the lack of expected results when I plug it into the mains.

What I want to happen: Arduino receives LDR (10k ohm resistor with voltage divider) data and displays it on a scale of 0 to 9 on the 1 digit 7 segment display (1k ohm resistor, common anode) I have connected. I can confirm the 7SD is working fine, as it too reads 0 only. (I know the code could be more efficient but I couldn't be bothered.)

I have included a photo of the Arduino with breadboard circuit and serial monitor, but say if you need a wiring diagram for clarity.

Your help would really be appreciated!

Here's the code:

#include <SevSeg.h>
SevSeg sevseg; 
int LDRval = 0;
int LDRpin = A0;

void setup(){
    byte numDigits = 1;
    byte digitPins[] = {};
    byte segmentPins[] = {6, 5, 2, 3, 4, 7, 8, 9};
    bool resistorsOnSegments = true;

    Serial.begin(9600);
    byte hardwareConfig = COMMON_ANODE; 
    sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments);
    sevseg.setBrightness(90);
}

void loop(){
   LDRval = analogRead(A0);
   Serial.println(LDRval);
   delay(200);


if(LDRval >= 900) {
    sevseg.setNumber(9);
    delay(250);
    sevseg.refreshDisplay();
  }
   
if(LDRval < 900 && LDRval >= 800) {
    sevseg.setNumber(8);
    delay(250);
    sevseg.refreshDisplay();
  }
if(LDRval < 800 && LDRval >= 700) {
    sevseg.setNumber(7);
    delay(250);
    sevseg.refreshDisplay();
  }
if(LDRval < 700 && LDRval >= 600) {
    sevseg.setNumber(6);
    delay(250);
    sevseg.refreshDisplay();
  }
if(LDRval < 600 && LDRval >= 500) {
    sevseg.setNumber(5);
    delay(250);
    sevseg.refreshDisplay();
  }
if(LDRval < 500 && LDRval >= 400) {
    sevseg.setNumber(4);
    delay(250);
    sevseg.refreshDisplay();
  }
if(LDRval < 400 && LDRval >= 300) {
    sevseg.setNumber(3);
    delay(250);
    sevseg.refreshDisplay();
  }
if(LDRval < 300 && LDRval >= 200) {
    sevseg.setNumber(2);
    delay(250);
    sevseg.refreshDisplay();
  }
if(LDRval < 200 && LDRval >= 100) {
    sevseg.setNumber(1);
    delay(250);
    sevseg.refreshDisplay();
  }
if(LDRval < 100 && LDRval >= 0) {
    sevseg.setNumber(0);
    delay(250);
    sevseg.refreshDisplay();
  }
}

From your photograph:
The bottom row of holes on the breadboard is not connected continuously from end to end.

There is a break in the middle of the row - This is indicated by the red marking on the breadboard.

You are relying on this track being continuous to supply 5V to your LDR / resistor. With the break, you will always have 0V going to the analogue pin (and hence the reading of 0)..

John, thank you so much - instant fix. I feel stupid now - I have been under the assumption that this was all 1 track connected continuously.
It works just as I wanted it!

No need to feel stupid, it's an easy mistake to make - I bet the breadboard isn't supplied with full instructions on what their graphics actually represent.

Glad to be of assistance.

Can you share your new code about that