doesn't work :(

Do you have the plugin activated more than once? Take a look at your wp-content/plugins/ folder and make sure you don’t see anything weird there with “admin-bar-disabler”, either a .php file or a folder, you should only see ONE /wp-content/plugins/admin-bar-disabler/ plugin folder.

thanks you for your fast answer !!!
I have installed: Disable WordPress Core Updates
and i have only ONE admin-bar-disabler folder.

You shouldn’t be seeing that error then, something must be going on that’s not something I normally see. Which version of Admin Bar Disabler are you using?

1.0.3 and my hosting is under Win 2008 std

Try reinstalling the plugin, looks like your line numbers aren’t matching up with the line numbers they should be.

i try to reinstall plugin more and more… but always same result.

Can you copy/paste the contents of your /wp-content/plugins/admin-bar-disabler/admin-bar-disabler.php to https://pastebin.com/ and send me the link you create?

yes sure: https://pastebin.com/sqBZC2CV

There doesn’t seem to be anything wrong with the plugin file you sent, I think something else might be going on here. What other plugins do you have activated?

i have these plugin installed:

Admin Bar Disabler
Disable WordPress Core Updates

What theme are you using?

i use a template that i have buy from templatemonster.com that i have customized.

WordPress Theme 1051 – https://www.templatemonster.com/wordpress-themes/28861.html

Try switching your theme to Twenty Ten / Twenty Eleven / or Twenty Twelve. If you don’t see the errors, then your theme is doing something wrong. I’m not able to help provide support for the theme you bought, not every theme is developed to be compatible with every plugin.