I’ve been having this issue for a few weeks now. I go in to read a lesson and then do the SRS for that lesson I allow all the slide types cause i want the maximum exposure to the words. recently I would run into some slides that i can select an option 1-4 but the enter button isn’t activated to “click” nor can i use the enter key on my keypad and it seems to be an issue for its complimentary slide as well. The only options are to either quit the lesson, which would defeat the purpose, or skip the card which then doesn’t record my answer and update the statistics. I like the website but this issue here needs a bit of polish. Thanks for the work.
Thanks for reporting this. We will look into it.