Hi Again,
Go into your log file and search the work "fail" you have 44 failures, perhaps that will lead you to a resolution?
right clicking your OBS icon and running as administrator will probably fix the issue.
you can ignore the failures I paste below.
15:58:38.216: [CoreAudio encoder]: CoreAudio AAC encoder not installed on the system or couldn't be loaded
15:58:38.261: Failed to load 'en-US' text for module: 'decklink-ouput-ui.dll'
15:58:38.421: [AMF] Unable to load 'amfrt64.dll', error code 126.
15:58:38.423: [AMF] AMF Test failed due to one or more errors.
15:58:38.423: Failed to initialize module 'enc-amf.dll'
15:58:39.501: [obs-browser]: Version 2.8.6
15:58:40.738: VLC found, VLC video source enabled
15:58:40.929: A DeckLink iterator could not be created. The DeckLink drivers may not be installed
15:58:40.930: No blackmagic support