My guide books lists Monteoliveto in Piazza Monteoliveto contains the Cappella Mastrogiudice and the Vasari Sacristy. Googlemaps and google don't pull up any information for me except for the Vasari Sacristy. I am trying to locate it but really trying to find the times it is open and closed. Does Monteoliveto go by any other name? Thank you.

Yes, Sant'Anna dei Lombardi. I've been there, don't remember the opening/closing hours, but this is the website:

https://www.santannadeilombardi.com/en/

ETA: Info page with hours and map:
https://www.santannadeilombardi.com/en/information/

Wikipedia has a pretty good page on it too, just FYI.