求助，网件 wndr4300 刷 openwrt 后安装任何应用都报错

路由器是网件 wndr4300 ，刷的包是 @mind3x 最新的那个，之前都正常，后来有次我按 wps+rest 重置之后就不行了，安装应用就报错，以下是安装 aria2 报错代码（其他应用也都是类似报错）：

Installing aria2 (1.18.7-1) to root...
Downloading http://downloads.openwrt.org/snapshots/trunk/ar71xx/packages/packages/aria2_1.18.7-1_ar71xx.ipk.
Installing libstdcpp (4.8-linaro-1) to root...
Downloading http://downloads.openwrt.org/snapshots/trunk/ar71xx/packages/base/libstdcpp_4.8-linaro-1_ar71xx.ipk.
Configuring libstdcpp.
Configuring luci-i18n-chinese.
Configuring aria2.

//usr/lib/opkg/info/libstdcpp.postinst: line 3: default_postinst: not found
//usr/lib/opkg/info/luci-i18n-chinese.postinst: line 3: default_postinst: not found
//usr/lib/opkg/info/aria2.postinst: line 3: default_postinst: not found
Collected errors:
* pkg_run_script: package "libstdcpp" postinst script returned status 127.
* opkg_configure: libstdcpp.postinst returned 127.
* pkg_run_script: package "luci-i18n-chinese" postinst script returned status 127.
* opkg_configure: luci-i18n-chinese.postinst returned 127.
* pkg_run_script: package "aria2" postinst script returned status 127.
* opkg_configure: aria2.postinst returned 127.

重启重置过了都没有用，百度谷歌也没找到答案，初玩 openwrt 不懂，求解救啊……