Once you download the file (usually a .zip or .srt ), follow these steps:
If it's a .zip , right-click it and select "Extract All." You need the .srt file inside. subtitle The.Mule.2018.720p.BluRay.x264.[YTS.AG]
Search for "The Mule" and look for the entry that matches "720p.BluRay.x264". Once you download the file (usually a