unexpected EOF while looking for matching `'', syntax error: unexpected end of file

[NADEENak4]

I have the below code in bash, and I always get the same error :
the error:
/usr/local/matlab/bin/matlab: eval: line 1780: unexpected EOF while looking for matching `''
/usr/local/matlab/bin/matlab: eval: line 1781: syntax error: unexpected end of file

the code:

jobs_per_node=8
  num_nodes=24
  job_counter=0
  for input1 in {1..24}; do
      for input2 in {1..8}; do
          # Increment job counter
          job_counter=$((job_counter + 1))
          # Break after submitting 2 jobs for testing
          if [ "$job_counter" -gt 2 ]; then
              break 2  # Exit both loops
          fi
  
          # Determine which node the job will be assigned to (1-24)
          node=$(( (job_counter - 1) / jobs_per_node + 1 ))
  
          echo "Submitting jobs to node $node"
  
          # PBS script content for this particular job
          echo "#!/bin/bash" > run_${input1}${input2}.sh
          echo "#PBS -q zeus_comb_short" >> run_${input1}${input2}.sh  # Adjust the queue as needed
          echo "#PBS -l select=1:ncpus=1:mpiprocs=1:mem=14GB" >> run_${input1}${input2}.sh
          echo "#PBS -m abe" >> run_${input1}${input2}.sh
          echo "#PBS -M [email protected]" >> run_${input1}${input2}.sh
          echo "#PBS -N job${input1}${input2}" >> run_${input1}${input2}.sh
  
          # Change directory to the correct location (handling spaces)
          echo "cd '/home/nadeen.ak/CD7 screen code/combined_version_july2024'" >> run_${input1}${input2}.sh
  
          # Add the directory to MATLAB's path and run the main function
          echo "matlab -nodesktop -r \"addpath(genpath('/home/nadeen.ak/CD7 screen code/combined_version_july2024')); main(${input1},${input2}); exit;\" " >> run_${input1}${input2}.sh
  
          # Submit the job to the queue
          qsub run_${input1}${input2}.sh
  
          # Clean up the script
          rm run_${input1}${input2}.sh
      done 
  done

I will appreciate any help :)
thanks