Question Gray window after installation

Please check : whiteface2.esy.hu/index.php/forum

try first to set crypsisb3 as default kunena template, and see if the issue has been fixed, else you need to set crypsis back as default and set the option "Load bootstrap" to yes.

For the gray window, you have enabled a lighbox module, you need to disable it.

Change to Crypsisb3 and back to crypsis : gray window - no change.
Lightbox module disabled : no change.

Change to Crypsisb3 and back to crypsis : gray window - no change.
Lightbox module disabled : no change.

Bonjour,
I've just subscribe for this forum cause I met this issue with Kumena 4.0.12 and Joomla 3.6.4, so I thought upgrading to Kumena 5.0.3 could fix the issue, Hélas, I still have a gray overlay prohibiting any action on button or menu.
(see the screen shot below)
I went to the url : whiteface2.esy.hu/index.php/forum but it is in flemish language and ... I don't speak any Flemish, just a little english.

Can I solve the trouble with editing the CSS file ?

Thank you for attention, truely, Richard.

It seems, the forum is available only for registered users.

I see now on your image a very high z-index for this element. Try reduce this.

I didn't change anything in CSS or what so ever...
If via the inspector, I change the z-index to -5, the overlay disappears but the cursor is stay inoperative, you can't navigate (only on main menu and aside modules).

Here we are !
I desactivated a module called BT Login wich appear as a popup and the kumena forum works fine.