Never used this software, but I would recommend looking it up on flathub and there should be links to the project homepage (if you need instructions for how to use it) and to its issue tracker (if you think you have found a bug).

Btw. I'm guessing your post is getting downvoted because it's impossible to know what is wrong based on the information have have provided. "It doesn't work" and "it doesn't produce any answers" tells us absolutely nothing about the actual error. Almost anything could be causing those kind of symptoms.