Can't comment on a post I found with google
OK, I had a problem on Fedora after an update so I googled for a solution. One of the search results lead me to "PrusaSlicer 2.9.2 not showing the main window" on this forum but it didn't have the answer. I later found the answer and being the helpful sort I came back to the forum post via the google link to post the solution. I couldn't comment as I was not logged in so I logged in and ended up in the forums landing page. I then searched the forum, found the post, clicked on it and the forum told me I was not logged in even though I most definitely was. If exit the post I become logged in, If I open the post and use the next/previous buttons I become logged in on the next and previous posts. I cleared my browser cache and it still does it. I think you may need to have a look at your forum settings.