To be clear, and because it is better for me to say this now rather than later, I have been playing the game on linux through proton. I hadn't mentioned this earlier because the chances that Lucibear had a similar setup were incredibly low, so it probably wasn't causing the issue. My main reason for not using the SVN version is that the installation for it is much harder to do with this setup (also why I figured I wouldn't be opening the dmp files any time soon).
Now that I've tried to install it using SVN, I keep running into this "Call not implemented" error. From my googling it seems to be a windows system error, which I wouldn't know much about. Probably caused by wine so I don't expect you guys to know the solution.
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I've tried using both the svn:// and https:// and the only difference I have seen is the svn one will download a few megabytes of stuff before giving the error whereas the https one only does a few kilobytes. Also running with admin permissions doesn't change the outcome. I also tried making a link from a directory without spaces to the mods folder (because the errors seem to be having issues with that) and that also made no difference.