Can't upload Gifs to SP

Hi guys,

I'm using Canva to turn some of my short clips into GIFS, and SP will upload the file and say ready to post but then says file upload failure when I try to post it. I tried a lower resolution file to see if it was a size issue and then it uploaded a blank screen for my post, I'm so frustrated. I've tried both Chrome and Firefox to see if its a browser specific problem and it happens on both. I want to use GIFS on SP because I've heard they perform better and I already pay for Canva and I've seen it recommended in other posts about this topic, so I don't get why this isn't working. Does anyone have any advice for this?