And now the cursor thing stopped working again. It was working for several hours today, however.
Not sure if it's relevant but it stopped working after I bought some upgrades in the Element shop. But I'm pretty sure I hadn't bought anything from the Element shop the first time the cursor stopped working so maybe it's certain upgrades? Not sure.
I've saved and refreshed. Still won't work now.
Here's a short vid that shows what happens after I enable custom cursor: