IBC - Cloud table loader - Installation issue

We are using Celonis provided tool to transform the data files extracted from SAP ECC and upload into IBC cloud. Since this process is time consulting, we wanted this to be done by multiple people in our team. We are having issues in installing this tool in our client provided laptops. Everyone in our team is facing same issue. During installation we see error installing module names pyxlsb The error description shows "Maximum retries exceeded with url SSL Error - SSL Certificate Verify Failed During actual upload - we get error No module named Pyxlsb Did anyone else encountered this type of issue before? What do you think is probably solution? Thanks, Vilas Kulkarni NTT Data, McKesson - Celonis implementation project