It's probably under wrong ID.
With the error msg didn't you get a link to the subtitle?
I dont know why but this made laughMy wrong, I was doing some upgrades/maintenance and forget to turn on site (( I am sorry guys.
are you downloading and uploading subs as registered user?As this site adds few random advertisements into subtitles they are then marked as new instead of same as original.
Just needed to remove extra adds with Subtitle Edit and it worked.
If it uploads as "new" subs, meaning the file is different. Or to simplify, to update new video hash you have to upload the exact file you have downloaded from OpenSubtitles and not alter / change anything inside it.
2. Exactly how to update new video hash into existing subtitle?
This ain't fixed, still shows error 3OK, everything should be fixed, if there are some issues, let me know.