Edock stand-alone version error message

I downloaded Edock to our local workstation and received the following error message from prepare.py script (step 1 of Edock in the readme file)

Traceback (most recent call last):
File "/vol1/software/edock/2018.08.6/script/beforedocking//negativeimage_4/GenerateBindingSiteNegativeImage.py", line 255, in
vReceptor = getHeavyAtomsFromFile(rec_file)
File "/vol1/software/edock/2018.08.6/script/beforedocking/negativeimage_4/GenerateBindingSiteNegativeImage_MOD.py", line 115, in getHeavyAtomsFromFile
r[0] = float(line[30:38].strip(' '))
ValueError: could not convert string to float:

I attached the input files (ligand mol2 file, receptor PDB file, binding site from COACH), the SLURM job output (with all the output messages produced by Edock) and the output folder. Looks like some of the outputs are not produced such as box_result, grid_result, sphere_result, grid_output, negativeimage_result, negativeimage_model*.pdb, rec_box*.pdb, select_spheres*.spa

I will appreciate if you can help. Thanks.