The first error will happen often depending on the video source.
It’s nothing to really worry about. The other errors sound like you don’t have certain software installed. Make sure to install the software below as listed in https://discuss.eroscripts.com/t/joyfunscripter-0-13-1-make-your-own-scripts/2552
https://github.com/Nevcairiel/LAVFilters/releases
https://www.microsoft.com/en-us/download/details.aspx?id=53587