No subtitles found - for the last 3 weeks now

For the last 3 weeks I have the problem that I dont get any subtitles at all.

I use Kodi 17 on a QNAP NAS - it worked great wit subscene which I prefer for subtitles- but for the last 3 weeks whenever I start a movie and then manually go to Subtitles I immediatly get shown "No subtitles found" - theres no "Searching for subtitles beforehand.

I tried many times to enter the manual searchstring - different ways in writing - always the same result.
I also checked with subscene online if subtitles are availabe - and I see that theres a subtitle for my movie available.

Then I installed other AddOns like Argentime and OpenSubtitles - but with same problem - No subtitles found.

I checked all the settings possible - but found no way to set anything - but I also ddnt change anything for the last 3 weeks.

So - has subscene mybe chenged something during the last month ?
Or has anyone an idea what I should check or do ?

I have a broadband internet hee with 16mbps so it cant be a slow connection or timeouts.