How to keep the transparency in my animated GIFs?

Site URL: https://tuatara-krill-njhw.squarespace.com/blog/pastels-apwt8

Dear everyone,

I tried adding some animated GIFs I made but I can't seem to keep the transparency when I add it to my squarespace site. It makes everything that should be transparent totally black. How can I keep the transparency in my GIFs?

You could check it out here: https://tuatara-krill-njhw.squarespace.com/blog/pastels-apwt8

Password: animatedgifs

I see your gif already black inside

Please check: 

Quote

https://images.squarespace-cdn.com/content/v1/63401dee58630640dc5235de/1665146897678-GKWEAKHMPQBGXJGDRF9B/Jocky+W+Discipline+is+Freedom20.gif?format=300w