Good morning, I have replaced the discs and pads on a 2009 Opel Corsa D 1.3 mjt engine type z13dtj I went out to test the car and while braking slightly I noticed that the front right wheel does not brake

I checked the mechanical part, everything was OK, I went into the diagnostics, no error was present, the hydraulic part, on the other hand, on the wheel in question there is no oil arriving, logically I checked that there are no obstructions in the hoses, the oil does not come from the ABS hydraulic control unit, I tried to disassemble it, blow it out

blowing in the passages I tried to activate with the tester the valves work but from the front right nothing can you give me some indication?

I don't know if it was like this before but the wear on the pads I replaced was regular

Thank you Arici guido