The script works just fine, the issue is your site & what i believe is breaking the code, which is a font style inherit call wrapped around the code.

As i already said, start by disabling any addons that relate to posts.

If your forcing a font usage on the site, disable it & use a default style to test its working.

I tested without the addons and the same.
I'm testing default style

--------------- Added [DATE]1542665940[/DATE] at [TIME]1542665940[/TIME] ---------------

I test tomorrow because here in Belgium, it's 11:30PM
Sleeping

By and tomorrow and thank you

welcome

Hello,

where is this option in vbulletin ?

There isnt a setting, as i said its in your style.

Yes thanks but where in the style ?

You have a custom style, you'll need to check your templates.

Enable this in the admincp
Add Template Name in HTML Comments

Then you can do an inspect by right clicking on your page & checking the coding.

Hello,

My style is abyss.

I'm in the template but I do not understand what I have to look for

Here font usage on the site: font-family: tahoma,verdana,arial,sans-serif

For information, if I use the style vbulletin, I have the same problem.