stanstrad This will be fixed in the next release. In the mean time go back to 0.9.11 of Web Remote.
See https://discuss.openlp.org/d/6100-web-remote-after-remote-update/21 on how to update.
Or you can use this work around to mimic another user agent in OBS with command line argument "user-agent".
For example to use Microsoft Edge v122 as user agent in OBS:
--user-agent="<Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36 Edg/122.0.0.0>"