cannot open shared object file: No such file or directory, even after modifying LD_LIBRARY_PATH variable

Question

I have been trying to use PETSc for some MPI enhanced matrix operations, but I keep getting this error when I submit the job using slurm on a supercomputer:

ERROR: ERROR: LoadError: LoadError: could not load library 
"/home/20ph92r03/petsc/arch-linux-c-debug/lib/libpetsc.so"
liblapack.so.3: cannot open shared object file: No such file or directorycould not 
load library "/home/20ph92r03/petsc/arch-linux-c-debug/lib/libpetsc.so"
liblapack.so.3: cannot open shared object file: No such file or directory

And this is my jobscript

#!/bin/bash
#SBATCH -J slepcTest
#SBATCH -p standard-low
#SBATCH --output=slepcTest-out
#SBATCH -n 2
#SBATCH -t 1:00:00

module load compiler/intel-mpi/mpi-2020-v4

export LD_LIBRARY_PATH=/home/21ph92r03/julia-1.8.0/lib/julia:$LD_LIBRARY_PATH

time mpiexec -n 2 /home/20ph92r03/julia-1.8.0/bin/julia mpiSlepc.jl

I have followed the earlier threads related to the same error and modified the LD_LIBRARY_PATH environment variable in the .bashrc file, like this:

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:'/home/20ph92r03/petsc/arch-linux-c- 
debug/lib/:/usr/lib64/'

But the error persists. I don't know what else to try!

Thanks!