Issue with hybrid pair style

Dear LAMMPS users,

I am tying to model 2 types of atoms, Graphene sheet over silicon, according to literature, I am using Sterling-Weber potential for Silicon, AIREBO for Graphene sheet and lj/cut for Si-C. I use these lines for pair styles, but go this error message: " ERROR: Pair coeff for hybrid has invalid style (…/pair_hybrid.cpp:353)".

pair_style hybrid lj/cut 2.5 airebo 3.0 sw
pair_coeff 1 2 lj/cut 1.0 1.5
pair_coeff 2 2 ./CH.airebo C
pair_coeff 1 1 sw Si.sw Si

I appreciate your time and helps.

Best Regards,