Create a new local Windows user account. Install the fixed player there. If it works, your main profile has registry corruption.
Once loaded, the player is straightforward: windows iptv player 3000 fixed
Do you have a you're looking for (like multi-screen or recording)? Create a new local Windows user account
If you cannot get IPTV Player 3000 to work safely, these Windows alternatives are superior and actively updated: windows iptv player 3000 fixed