InDesign Stuck on 'Completing Initialisation' During Startup - macOS Sequoia 15.1

Hello, 

My Indesign won't open up at all. It won't go past the opening dialogue. It goes to 'Completing Initialisation' and then the wheel of doom starts spinning. I've tried deleting it and reinstalling and I've tried the Creative Cloud Cleaner Tool but nothing seems to help! Any help would be much appreciated. 

I'm using:

macOS Sequoia 15.1

Indesign (20.0)

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