Missing Letters

  • There is some missing Letters like Š/š and Ž/ž. Instead of them is question mark.
    I can see these Letters in Font file, but they don't show up.
    Is it possible to fix it?

    DM920 UHD * Triple S2/S2X/C/T2+Dual C/T2 * HDD3TB
    Terrestrial, Cable, 0.9W, 5E, 13E, 19.2E, 28.2E