MMPBSA_Error: Could not find necessary program [ GROMACS ]

[cnrahul]

Could you help me with the following error?
I have already installed gromacs2018.8 in my system in the root.
While I installed gmx_MMPBSA in the local path.
I followed your conversation in google group with the following error
INFO ] Cloning gmx_MMPBSA repository...Done.
[INFO ] Example STATE

[INFO ] Protein-Ligand (Single trajectory approximation) RUNNING
[ERROR ] Protein-Ligand (Single trajectory approximation) [ 1/ 9] ERROR
Please, check the test log
(/home/demo/gmx_MMPBSA_test/examples/Protein_ligand/ST/3.log)
[INFO ] Protein-Protein RUNNING
[ERROR ] Protein-Protein [ 2/ 9] ERROR
Please, check the test log
(/home/demo/gmx_MMPBSA_test/examples/Protein_protein/4.log)
[INFO ] Protein-DNA RUNNING
[ERROR ] Protein-DNA [ 3/ 9] ERROR
Please, check the test log
(/home/demo/gmx_MMPBSA_test/examples/Protein_DNA/5.log)
[INFO ] Protein-Glycan RUNNING
[ERROR ] Protein-Glycan [ 4/ 9] ERROR
Please, check the test log
(/home/demo/gmx_MMPBSA_test/examples/Protein_glycan/7.log)
[INFO ] Comp_receptor RUNNING
[INFO ] Comp_receptor [ 5/ 9] DONE
[INFO ] Alanine Scanning RUNNING
[ERROR ] Alanine Scanning [ 6/ 9] ERROR
Please, check the test log
(/home/demo/gmx_MMPBSA_test/examples/Alanine_scanning/12.log)
[INFO ] Stability calculation RUNNING
[ERROR ] Stability calculation [ 7/ 9] ERROR
Please, check the test log
(/home/demo/gmx_MMPBSA_test/examples/Stability/13.log)
[INFO ] Decomposition Analysis RUNNING
[ERROR ] Decomposition Analysis [ 8/ 9] ERROR
Please, check the test log
(/home/demo/gmx_MMPBSA_test/examples/Decomposition_analysis/14.log)
[INFO ] Interaction Entropy approximation RUNNING
[ERROR ] Interaction Entropy approximation [ 9/ 9] ERROR
Please, check the test log
(/home/demo/gmx_MMPBSA_test/examples/Entropy_calculations/Interaction_Entropy/15.log)
I did,

echo $PATH| grep -i gromacs
/usr/local/gromacs (in red)/bin:/home/demo/miniconda3/envs/gmxMMPBSA/bin:/home/demo/miniconda3/condabin:/usr/lib64/qt-3.3/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:/home/demo/.local/bin:/home/demo/bin

Kindly help resolve.
If I redo the installation in root will it help.