Chart APP error : sc_unserialize.php linha: 22

hello,

SC 9.7.0.14 , when opening the theme option in the treemenu of the chart APP, the error append :

unserialize(): Error at offset 0 of 1551 bytes | Script: /Users/myname/Sites/localhost/scriptcase/devel/lib/php/sc_unserialize.php linha: 22