Troubleshooting
It will not start
What to do when TinePlayer will not install or will not open.
Windows says it protected your PC
The installer is not signed, so Windows does not recognize it. Choose More info, then Run anyway, or use the portable version.
apt cannot find the package
The leading ./ is missing. Without it, apt looks for a package by that name in its own sources rather than installing the file in front of it:
sudo apt install ./tineplayer_*.debThe package will not install on Linux
You may have the wrong architecture. Ask your machine which it wants:
dpkg --print-architectureamd64 is most desktops and laptops; arm64 is a Raspberry Pi. See Installing TinePlayer.