What plugins are you using for the popups?
Please provide a link to a page on your site where we can see this.
I don’t use plugins for the popups.
I’m referring to popups showed, for example, when you click on the title of a plugin in the add-plugin windows of wordpress.
Try to yourself: in the Admin backend ->> Plugin -> Add Plugin try to click on the name of a plugin: window fades to grey and then a pop-up must appear with the plugin description: in my website the main windows becomes gray (fades) but pop-up window is not showed, then I must click “ESC” button on keyboard to turn window active again.
This may be a plugin or theme conflict. Please attempt to disable all plugins, and use one of the default (Twenty*) themes. If the problem goes away, enable them one by one to identify the source of your troubles.
If you can install plugins, install “Health Check”: https://wordpress.org/plugins/health-check/ On the troubleshooting tab, you can click the button to disable all plugins and change the theme for you, while you’re still logged in, without affecting normal visitors to your site.
Thank you for the advice.
I spotted the problem: is WassUp Real Time Analytics plugin. If I deactivate it, pop-up works.
I’ve searched in the Wassup support forum and I think that a problem like mine is faced here: https://wordpress.org/support/topic/bug-wordpress-lightboxes-are-disabled/
I’ve tried to edit wassup.class.php and now works
