Before inserting the roll film, you have to take off the film pressure plate.
Press it lightly and at the same time, slide it, then it will come off.
Here, you have to do each procedure depending on either 120 film or 220 film you use.
When inserting the 120 film: coincide "12" (yellow) on the film pressure plate with the yellow-colored index.
220 film: coincide "24" (red) on the film pressure plate with the red-colored index.