Problem to recognize the .pdb file

I want just to derive the free energy change of protein-protein complex, by using a model obtained with the ClusPro program. After sending a .pdb or .mmmCIF file, the Prodigy program send me the following note: "Error during parsing the input sructure: (model.000.01_WT.pdb - invalid literal for int() with base 10: ““SER””).
How can I overcome this problem?
Thank you for your attention


This is likely due to some formatting of the pdb file, please run it over pdbtools’ pdb_tidy - PDB-Tools Web and trying again.