If you have already obtained the ZIP file from a trusted provider:
Most "Pro" features in these apps require an M3U URL or Xtream Codes login, which you must get from your IPTV service provider . The app itself is usually just an empty shell. Download IPTV Zahapy ProMAX zip
Are you trying to install this on a , Android Box , or a PC ? Knowing the device can help me give you more specific steps. If you have already obtained the ZIP file