open_basedir is used to limit the files that can be accessed by PHP to the specified directory-tree, including the file itself. Sometimes though, it may cause your application not to run and as such, requires to be disabled.

To disable open_basedir directive in Plesk, follow the steps below

1.Login to Plesk Control Panel

2.Go to Subscriptions

3.Click on the domain name you want to change the setting for.

4. Click on PHP Settings

5.Scroll down to open_basedir and select none from the drop down

6.Click Save at the bottom of the page