Usage problem with standalone SSIPe.

I was trying to use SSIPe standalone program. However something is going wrong. I'm preparing the "complex.pdb" and "mutList.txt" files and running the following code;
../SSIPe.2019-11-09/bin/get_final_score3.py ./

and then following error is printed in stdout;
step 4: get_evoef_score
mv: target '.pdb' is not a directory
EvoEF failed generating wild-type or mutant model for mutant VA471G

What is wrong here? Is program failing to create mutant pdb files or should I create them in someway beforehand? If second, how can I create those mutant complex ? There are hundreds of mutations in the list.