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…

Appendix

Making Ukulele Tabs with Musescore : Free Template

MuseScore 4 Sync to Film Workaround Step-by-Step

Playback not playing the proper rhythm : r/Musescore

Musescore 4: How to Playback Chord Symbols

Musescore 4 not playing certain notes on playback (especially

Cannot Play Scores in Musescore PC App

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

Basics

Exporting my mp3 files that used to be musescore files to apps won

Can't play song or scroll through music sheet on website