GromacsError: Structure contains unl1 molecules, but no template defined

[Ooloba Whenu]

Good morning all
I am trying to run calculation on protein-ligand single trajectory but I keep getting the error 

GromacsError: Structure contains unl1 molecules, but no template defined

attached are my input files and the log file

the trajectory file is too large

[marioe911116]

THis is a common error that has been posted multiple times in the group... please, check this thread, for instance:

https://groups.google.com/g/gmx_mmpbsa/c/Z0bPSfHiowg/m/8n28YLykAwAJ