The Page Link field will not disply in front-end for visitors (or users that is not admin).
Here is a code sample, where I try to get the field from front-end:
$button_text = get_field('profile_company_default_button_text', 'option');
$button_url = get_field('profile_company_default_button_url', 'option');
var_dump($button_text, $button_url);
And here is response for admins:
string(13) "Læs mere her" string(36) "http://fynskerhverv.local/synlighed/"
And here is response for other users and visitors:
string(13) "Læs mere her" NULL
As you can see, the page url is fetched correct when admin, but not when not an admin.