Achievement page can`t be found

Dear Michael,

When I create new achievement, the page cannot be displayed, namely I get the notice that it cannot be found.
However when I embed this achievement through shortcode in a regular WordPress page, it displays. But when I try to open it from there, of course it leads me to the same “page can`t be found” error.
Another thing, before this was working, not sure what could be the reason now it doesnt. What I see different from these quests that work is that when these types of quests are listed the word "preview" is written as an option to see a quest in a live view, while on the new type of quests (which cannot be displayed) the word written is "view". Dont know if this is a clue for something…
Do you have maybe any idea what is happening?

Thanks,

Nikolina

https://wordpress.org/plugins/badgeos/