I do have the same problem here. Kodi Vanilla (no builds) with A4k and subsloader. Please try the following. Go to opensubtitles.com domain (not org) then click on login and select import account from opensubtitles.org. Follow the instructions and create your account. Then use it again with your addons.
The A4k version I have is also 3.10.0 `a4kSubtitle repository.
Was working great last week in Twilight.
I’m in the process of checking out the RealDebrid links I’m downloading. Are finding that some pull the a4k while others don’t. I want to download at least 50 links and see hoiw they interact before I can know for sure. But it could be the links.
This is the tutorial I used to integrate open subtitles into Kodi and it will allow you to use subtitles on any add-on How to Get Subtitles on KODI with OpenSubtitles (2023) I haven’t had any issues and you may have to use different add-ons because the Open subtitles work fine on the builds and add-ons I use.
Normally its a simple browser cleaning, cache & cookies. Not having any issues myself. Make sure your sign in info is correct, that could also trigger an error.
I was going nuts trying to get it to work and couldn’t! I’m so glad that others have reported the same results. They want you to pay for a VIP membership. No way.
Back when Kodi 16 in respiratory (Kodi subtitles) there was 4ksubs it was awesome but as of late wasn’t there by chance I found it. Since I always get help herei want to add the responsibility for anyone looking for the best. https://a4k-openproject.github.io/a4kSubtitles/packages/
I recently went through hell on earth trying to find working subs for season 2 of The Terror. I wound up finding another torrent that had a good set and downloaded that one instead. But a good sub app is a blessing, thanks!