We are aware of an issue with the OBS Studio plugin where actions appear with a question mark after updating to Stream Deck 6.1. A temporary workaround is available.
Our teams are working on resolving this issue as soon as possible. We apologize for any inconvenience and thank you for your patience.
Temporary Fix:
1. Open the Stream Deck application
2. Find the OBS Studio plugin on the right side in the action list
3. Right-click on an OBS action in the action list and select uninstall
4. Open the Stream Deck store and search for the OBS Studio plugin or open this link: https://apps.elgato.com/plugins/com.elgato.obsstudio
5. Install the OBS Studio plugin.