Perugia -- San Pietro Complex

Hi, Giangilberto from Milan, I called their contact number myself, but there was no answer, I’ll try again tomorrow.
Google says they’re closed right now, but I don’t always trust that, I prefer calling because Google's hours for churches and parishes are often out of date.
As for the official Municipality of Perugia website, it isn't working, though I’m including the link below just in case they fix it:

https://turismo.comune.perugia.it/poi/basilica-e-abbazia-di-san-pietro

The monastic complex and its cloister now house the University of Perugia’s Department of Agricultural Sciences, so they follow university hours rather than museum hours.
Since it is a parish church located within a university complex, the schedule is based on religious services and campus operations, not museum visits, which is likely why you’re having trouble finding the times.
The best approach is to contact the parish directly, I'll let you know if they answer tomorrow.
Alternatively, you could just go there in person; churches in Italy are open for Mass and generally for a few hours around those times.

Thanks, very much appreciated.