A few hours ago users created bug reports regarding playback issues with the latest Stremio v5 update, we reverted the changes 1 hour ago while we could investigate the issues further.
We have now deployed a hotfix for the bug, if you are encountering any playback issues with Stremio v5 on Windows you should use CTRL+F5 in the app to refresh the UI and the app should work as expected.
We apologise for any inconvenience this may have caused.