Fatal error on latetst ACF 5 pro and 4.3.1

[jmslbam]

Wanted to use this plugin but got this error, sorry can't send a PR, but I did wanted it to let you know:

Notice: Uninitialized string offset: 0 in /srv/http/els_wp_local/current/public/app/plugins/advanced-custom-fields-link-picker-field/acf-link_picker-v5.php on line 147

The field is inside a flexible content field > and then within a repeater field :)

[jmslbam]

Ok found it

if ( empty( $field['value'] ) || $field['value'] === FALSE || (isset($field['value']['url']) && $field['value']['url'] == '') )
        {
            $field['value']['url'] = '';
            $field['value']['title'] = '';
            $field['value']['target'] = '';
            $exists = false;
        }

On line # 147 it calls the $field['value'] but well.. that one is empty.
So now the field does display, but after click the "insert link" button. it submits the page.

New bug..