From the analyzer log it looks like to be an issue with finding/opening the registry key. You can check if it is present in the registry editor of your machine. You can find details about the dispatcher in the installed_folder\opensource\mfx_dispatch\readme-dispatcher.rtf
Another thing which can be helpful is to run mediasdk_sys_analyzer which basically analyzes the system and reports back Intel Media SDK related capabilities, driver and components status and send log. There is a readme present in the tools\mediasdk_sys_analyzer for more details. This can help us ruling out any OS or driver issues.
Please let us know your finding. Thank you for your question.