FOSS gamedev and creative worlds

what is this when i install a mod, this appears ''Could not open file of texture: character.png
Loaded mesh: character.x PNG warning: Interlace handling should be turned on when using png_read_image PNG warning: Interlace handling should be turned on when using png_read_image. i then my mod dosent work.(even if the depends is default) please respond!

These warnings are normal and should have no effects on mods.