I have a problem, that i installed WHMCS WP Integration

Hi,

I have a problem, that i installed WHMCS WP Integration and set up the correct Remote WHMCS host and then when hit save i got the error message:
Settings Updated
PHP open_basedir is on

How can i fix it ?

Also i see above this WHMCS url encoder - what it is for ? Shoud i set it up ?