Blueprint class of Button can not find Blueprint Function Library按钮类的子蓝图无法获取到蓝图函数库

[aiorosu_cn]

Every blueprint can get the BFL but the Button blueprint. this button class and BFL is migrated from other project, and in other project ,is work .
其他蓝图都能访问蓝图函数库，除了这个按钮子蓝图，这个按钮子蓝图和蓝图函数库是从其他项目导入的，在其他项目中能获取到蓝图函数库。