Does a project automatically appear centered onscreen? Is it possible you placed a component incorrectly by accident, far away from your board? Then you might see a blank screen because blank space is in the center between them.
Can you command the program to zoom out?
Can you examine the netlist (data file) and verify that it contains your components?
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Looking at the proportions of your horizontal scroll bar, the screen shows about 1/6 of the total project. I think most of it is offscreen. Try scrolling right, then you should see components.