I loaded the puzzle and was presented with an empty 7 character prompt. I tried typing in three different seven-letter words, and each time I hit "GO", I was told the word was "Not in the word list".

With no further guidance given, I closed the tab.

Thanks for the feedback. I've taken all the 7 letter words from the dictionary and filtered based on different criteria. I'm still thinking what's the easiest automated way to have all valid words, while avoiding offensive, inappropriate ones.

Similar issue, my first guess was "plaudit" and it was not accepted

Had a similar issue, several of my words weren't accepted.