When I insert the Adsense ID and press save, the plugin says “wait” but nothing happens.

Solution: I have found the problem. I have install the wordpress in subdirectory and It have some calls to the post function “/wp-content/plugins/best-google-adsense/ajax.php” that not calculate the subdir url.

Open wp-content/plugins/best-google-adense/resources/javascript.php

find and replace all reference of
$.post(“/wp-content/plugins/best-google-adsense/ajax.php”,{
to
$.post(“/subdir/wp-content/plugins/best-google-adsense/ajax.php”,{