OBS recording through reaper not possible with OBS 29
The obs logs on my OBS ver.29 shows that it's using websocket 5.1.0 but the client (reaper) is using a pre 5.0.0 version so it doesn't work.
obs-websocket is now included by default with OBS Studio 28.0.0 and above. As such, there should be no need to download obs-websocket if you have OBS Studio > 28.0.0
to use with reaper leafac (which uses the older websockets version) download:
https://github.com/obsproject/obs-websocket/releases/download/4.9.1-compat/obs-websocket-4.9.1-compat-Qt6-Windows.zip
or equivalent for your operating system.
install by unzipping in a prepared folder and then copying over existing location of OBS.
in obs -> tools -> websockets server -> disable Enable Websocket Server
then in obs -> tools -> websocket server settings (4.x Compat) -> enable Enable Websocket Server