Old uploaded SVG’s work, New one’s work almost never? [Files included]

Here is a dropbox link to two SVG separate files. I’ve named them ‘Working’ and ‘NotWorking’. I’ve also included a file called ‘Illustrator SVG settings’ to show how I export them as an .SVG file-type. This is the settings I’ve always used when getting working SVG’s to the best of my knowledge.
https://www.dropbox.com/sh/blsewvzq0hlwqww/AABpbzTh-BDIvVEJ-Ev2JTl6a?dl=0

The working SVG file is an old one currently up on my website, it was uploaded a year ago with the exact same copy of Illustrator; nothing is different.
I can take it and upload it to media on WordPress even right now and it still works, just as it did in the past. In fact I just now did it. The old one will also work with both of these tags:

I mean, duh. Why wouldn’t it?

So today, a year later, I made a new one. It showed up as blank white. But I can see the place it should be. So I made like 20 with different file names, using different Illustrator settings. And uploaded them all with these different tags and only ONE of them worked. So I tried again with the settings I’m fairly certain I used (see dropbox folder) and it DOESN’T WORK. I can take an .SVG file from another persons website and it works perfectly fine on mine with either of these two tags.

I’m now completely unable to re-create whatever it is I did and I’m pulling out my hair. I know it works, but idk if it’s my Illustrator? The settings I’m choosing? With artboard, without artboard, all items expanded and unlocked, all glyphs, some glyphs, link, embed, etc. Or maybe it’s my website??

If at all possible, could you please look at both of these two filetypes and compare them and see if anything is different in my settings that could account for this problem. Maybe I have to upload them somewhere to make them more compatible? If so, where would I do that.

Please help me!

– Thanks.