Custom Cursor CCS issue

Site URL: http://www.spencerproduct.com/art

I've tried inject code into 'Custom CSS' area which I got from a previous forum post. It was working up until today when I altered some  layout design elements, and now I can't get it back. I can't see the new cursor in Chrome, but in Safari it shows up, but flickers and doesn't move as easily as cursors should or normally do.

I've tried a few different codes but I'm not very fluent with this language so I'm not sure where it's wrong.

Here is the code I am putting this code into the custom ccs area

html, body {cursor: url(https://i.postimg.cc/DfMZQxvG/dot-cursor-black.png), auto;}
a:hover {cursor: url(https://i.postimg.cc/YS5Gx8f8/dot-cursor-gray.png), auto !important;}
.sqs-system-button {cursor: url(https://i.postimg.cc/DfMZQxvG/dot-cursor-black.png),auto !important;}
* {cursor: url(https://i.postimg.cc/DfMZQxvG/dot-cursor-black.png)

Can anyone help me figure out what happened?

Do you still need help on this?

This is happening for me as well. I've tried multiple strings of code and nothing is showing the custom pointer, and now I'm not seeing it on any sites in Chrome. Is there something I need to adjust in chrome? But why would it start not working when I've just been in Squarespace? 

I have the sam issue. the cursor does not load or flickers with movement.