Cetus 3D 2 printer troubles

Cetus 2

I have a Cetus 2 printer that had a clogged nozzle. After replacing the entire print head, the machine displays a “filament warning” error shortly after starting a print.

Additionally, the leveling sensor sometimes triggers without the nozzle actually touching the bed.

How can we resolve both issues, given that the entire print head—including its flat cable—is new?

if sombody have some trick, please help me!