I can't access Categories&Forums!

Whenever I click on Categories&Forums, this thing pops up. What can I do?

Sorry, you're going to have to translate that to English. Thanks!

What should Firefox do with this file?
1. Open with...
2. Save to computer.

I don't understand why I should open or download anything, I am only trying to edit the categories and forums.

So, you're just trying to edit the categories and forums?

Yes.

Okay, no problem.

Go to Admin Panel -->> General -->> Categories and Forums

From there is where you edit the categories and forums.

When I click on Categories and Forums, that message pops up.

Hmm... try it with a different browser.

Hello

I've sent your problem to our technicians. They will have to look at the issue as soon as possible Thanks

EDIT: Our technicians ask you to:
- Clean your cache and cookies
- Test on an other browser
- If possible test on an other computer or mobile

Thanks for your help

Thanks a lot!