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Hello @dinaddd,
The Login Access option allows you to restrict access to the admin panel of your website to all IP addresses, but the ones added in the plugin.
The IP addresses on the screenshot you provided are private IP addresses and are not routed on the Internet, which is why you see the reported error.
To obtain your public IP address (the one you should add in the Login Access feature), you may use an online tool such as the one below:
The IP address shown there should be added to the SiteGround security plugin.
I have already removed the previous restrictions so you can access your website’s admin panel. Now you should be able to log in and add the correct IP address.