ERROR: Non-numeric pressure - simulation unstable (src/fix_nh.cpp:1059)

LAMMPS LAMMPS Beginners
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Hello, I’m trying to equilibrate a film with LAMMPS simulation, but I seem to be having issues. This was the error given and I cant seem to understand why. Every other parameter like charges, bond coeff, angle coeff seem to be alright. Is there any way to fix this? Thank you

ERROR: Non-numeric pressure - simulation unstable (src/fix_nh.cpp:1059)
Last command: run 1000000

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You are not the first person to observe this error. Please search through the archives to see what was recommended to others and what was the issue in their case. There can be a variety of reasons.

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Have you solved it yet