When Otis runs across the field, gets hit and falls down, it is a reference to the running scene in 1917 (2019).
Both Alistair Petrie, who plays Headmaster Michael Groff, and Jason Isaacs, who plays Peter Groff, as siblings, appear in the Star Wars universe. Petrie plays General Draven in Rogue One: A Star Wars Story, an operative working for the Alliance, and Isaacs plays The Grand Inquisitor in Star Wars: Rebels, a Sith agent working under Darth Vader.
The crashed PC runs Windows XP, an operating system which has not been supported by Microsoft since at least 2014.