Some third-party Kodi players or external apps like Syncler (Beta versions) may fail to extract or send the IMDb ID to the subtitle request service.
Unlike manual downloading, a4ksubtitles automates the process by reading metadata from your video file. It looks for three primary identifiers: a4ksubtitles imdb id not provided
Then re-add the file to your library and refresh. Some third-party Kodi players or external apps like