Can Google Analytics track if cookies disabled? + traffic analytic problem

Site URL: https://www.machinevisionbar.com

Hi, 

I'm a bit confused regarding the analytics on my site. 

For example it says that I got 53 visits yesterday (and 50 unique visitors), but the "Activity log" only counts 11 visitors. Is it because the rest of the visitors disabled the cookies, therefore we can't track them? 

Same on my Google Analytics, numbers are different (22 visitors and 13 new users yesterday).

Does anyone has the same issue, or an explanation?  

If I look at the last month, Google analytics says 335 visitors, but Squarespace says more than a thousands, so the difference is huge... Is it because Google Analytics doesn't track traffic if visitors disabled cookies? 

Any answer/help would be very much appreciated !

Thanks, 

Marianne