[search-ag失效并提示Symbol’s function definition is void: counsel-more-chars]

(search-ag失效并提示Symbol’s function definition is void: counsel-more-chars)

我用Windows10下的Spacemacs 0.200.13 master版本，search-ag或者search-project-ag都不能使用，并提示if: Symbol’s function definition is void: counsel-more-chars ，本人小白，您方便具体说一下怎么解决吗？谢谢~