Flashcards

I'm having a problem when using Flash Cards in Moodle, the moment i want to publish the content is not displayed

1. Create a Flash card Content in Moodle with 2 questions
2. Moodle 2.9
3. Deskto'p
4. Explorer and Chrome
5. H5P plugin version:1.5
6. H5P content type version:1.5.3

Hi, Flash cards is great :-) That would be even better if we could add many different correct answers for on question.
I mean : the teacher (me) could accept more than one answer from the students. 
For example : I know that my students often forget the full stop at the end of the sentences. I would like to consider these sentences correct as well. So I would like to be able to enter the sentence with a period and the sentence without a period as two possible correct answers.
I hope I am clear :-)
Thanks again

Hi, I like ''Flashcards'' very much, unfortunately it is not really responsive. I mean it's almost impossible to fill in the blanks on the phone. I need my students to be able to work on their phones too, not only on the computer. That would be great if you could find a solution. Thanks. Elsa.