Bazzite. It was that specific app that couldn't open the file. I can't remember the name of the app Ocu-something I think. Dolphin was able to browse my server just fine. Honestly never had an issue like that on Linux before. I found a fix for it by going in and changing a config file for how the app handles files from SMB but expecting people to have to do that just for opening shit from a network share is just the kind of things that make using Linux annoying. I'm still going to work at it because Windows is bad too but they're not in competition because of how great Linux is. It's because windows is getting worse.

Edit: This was the specific issue: https://gist.github.com/NonLogicalDev/f518e93aa19d3fc620bae15d388cba58