Simulation of condensate system with 100 chains of protein

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GROMACS version:2022-beta1
GROMACS modification: No
Hi All,
I am trying to work on the condensate system where I have converted the C-alpha atoms of 100 proteins from the coarse-grained simulations into all atom model. Now I tried minimizing the system using the GROMACS with Amber-disp force field to study the intermolecular interactions between the protein chains. But, the system is not getting minimized.
em.log

           Step           Time
             14       14.00000


Energy minimization has stopped because the force on at least one atom is not
finite. This usually means atoms are overlapping. Modify the input
coordinates to remove atom overlap or use soft-core potentials with the free
energy code to avoid infinite forces.

The size of the system is 2029072 atoms

Could anyone help me out in this regard?

Thank you