Well, your race is not for 1.3, that probably doesn't help.

It's not just this race, it was just one I used by random. I've noticed it with Rimsec, with Orassans, with various others. And it is 1.3, as far as I know - in the comments of the Leeani mod, there is a link to an updated version.

Well the error in your log file indicates it is using at least some outdated tags, so I wouldn't be suprised if other tags were misconfigured as well.
It also would help immensely if you could actually show your issue.

Sorry for the late response. It is possible that it may simply be outdated, but it is up to date according to the developer of that mod, and Mod Manager. I don't know, I'm no coding expert. As for those images, here you go.

https://cdn.discordapp.com/attachments/600055481322438658/1010157198560739449/unknown.png

So, following your advice about it being an out of date version, I've re-downloaded the older version of that mod, and it has the same issue. I think it must be that the 1.3 version isn't actually updated, it's just changed so it doesn't come up on the Mod Manager complain list. Feelsbadman. Sorry for wasting your time, I assumed that an 'up to date' mod was actually 'up to date'. As for my issues with other race mods, I think it's as simple as me misremembering how big the tails of those races having to be.