When the problem is in OBS
Subtitles don't appear
First check that the session has started → recheck the URL in the browser source properties → right-click the source → Refresh (refresh cache). Caption overlay is available only with the All-day MAX pass.
Subtitles freeze
Open the Interact window and check the page → refresh the cache → if that doesn't help, end the EventCAT session and start it again.
The language won't change
In the Interact window, click the bottom of the page first, then set the language with the keyboard. Typing without clicking first won't work.
Screen capture is black (Mac)
Go to System Settings → Privacy & Security → Screen Recording, allow OBS, then restart OBS.
Audio echoes or doubles up
In the browser source properties, uncheck "Control audio via OBS", and mute any unneeded sources in the audio mixer.
PPT covers the scene
Switch the slide show to window mode. See the steps on the previous page.
Tip If nothing works, quit OBS completely, start it again, and check that your scenes and sources are intact.