On openSUSE the only python package with “mediainfo” in the name is python3-pymedianfo. It and mediainfo are installed. openSUSE's package manager describes python3-pymediainfo as “Python wrapper for the mediainfo library”.
I have this issue on openSUSE Leap 15.4 as well, with OpenLP 2.9.5. The Android app connects and controls the display just fine, but neither the stage nor main pages display in a browser properly (does not automatically refresh). I can access the ap…