Can't play my scores in Musescore 4

Just got Musescore 4, put a few notes in a new piano score, the bar that's supposed to move across the page just appears and doesn't move so I can't play…

Designing the Mixer for MuseScore 4

Our Progress on MuseScore 4 - First Alpha Released

Minor bugs in MuseScore 4 playback, presumably easy fix in next

MuseScore 4 Handbook

Basics

Can't Update Score Name After Uploading

Musescore 4 not playing certain notes on playback (especially

MuseScore 4 enable count-in option not visible; count-in tempo is

What is this? Musescore 4 : r/Musescore

Musescore 4 score could not be published online

MuseScore Café - MuseScore 4 Alpha

Our Progress on MuseScore 4 - Update 3

Waterfall - Toby Fox (more instruments) (Can't play it on the website

Handbook for MuseScore 4