Conformers -- test

GROMACS version: 2020.1
GROMACS modification: Yes/No
Here post your question
I tried to generate conformers using GROMACS. I used this article:
I upload my project and scripts here:
I now see that molecular structure doesn’t fix and atoms have random places during the simulation. I tried to have enough box in PBC.
In ideal i need to have low-energy conformations in dielectric medium.
Can anyone help me with this?
Thank for help.