订阅消息推送报错java.lang.NullPointerException: null怎么解决?
调用微信小程序推送订阅消息报错: java.lang.NullPointerException: null at cn.binarywang.wx.miniapp.api.impl.BaseWxMaServiceImpl.getAccessToken(BaseWxMaServiceImpl.java:173) at cn.binarywang.wx.miniapp.api.impl.BaseWxMaServiceImpl.executeInternal(BaseWxMaServiceImpl.java:290) at cn.binarywang.wx.miniapp.api.impl.BaseWxMaServiceImpl.execute(BaseWxMaServiceImpl.java:253) at cn.binarywang.wx.miniapp.api.impl.BaseWxMaServiceImpl.post(BaseWxMaServiceImpl.java:227) at cn.binarywang.wx.miniapp.api.impl.WxMaMsgServiceImpl.sendSubscribeMsg(WxMaMsgServiceImpl.java:36)