To whom it may concern
Recently I took a course called “ZERTIFIKAT B1 , آلمانی B1 لغات سطح”.
The course has 37 levels.
Sadly, I noticed that there are no words from level 19 and after that. 
I also subscribed for 1 month and it did not fix my problem.
Please find the attached image.
I can find the words in the levels 1 to 17 but it seems that, starting from level 18 some words are missed and from level 19 there is no word.
I have the same problem both on Web-portal and the Android device.
I will be looking forward for your response.
Bests