Openbox doesn't apply changes made in lxqt-rc.xml

I've wanted to edit some shortcuts, so I added a keybind to my ~/.config/openbox/lxqt-rc.xml, under <keyboard>

<keybind key="W-S-q">
      <action name="Close" />
</keybind>

Sounds pretty simple, but it doesn't apply the changes after openbox --reconfigure, as well as after reboot. XML in the file is not malformed, according to some online checker, so that's not the issue. In fact, I don't see any errors in journalctl. Other keybinds I add there also don't seem to work. It's even weirder since I copied it from my old config which worked fine under Manjaro. The only similar thing I found is this question, but I don't have any keybindings conflicting, so that's not the case. What am I doing wrong here?