Iteration limit 5000 reached at time X ns.

Hi,

I'm an absolute beginner to this world, i've made a schematic for my design then compiled it (which done successfully) then run the simulation first i hadn't set any input to high and everything worked fine but when i set whatever input to high (except the clock for sure) i got "Iteration limit 5000 reached at time X ns." error, where "X" is the time i set the input pin to high. so what's the problem and how to fix it?

environment:

• Quartus prime lite 18.1 Linux version