symptom

 Collected errors: * pkg_get_installed_files: Failed to open //usr/lib/opkg/info/resize2fs.list: No such file or directory. * pkg_get_installed_files: Failed to open //usr/lib/opkg/info/tune2fs.list: No such file or directory.

solve:

 opkg install --force-overwrite resize2fs tune2fs

symptom:

Chinese language pack missing

solve:

 opkg update opkg install luci-i18n-base-zh-cn

symptom:

 /usr/lib/lua/luci/dispatcher.lua:1379: module 'luci.cbi' not found: no field package.preload['luci.cbi'] no file './luci/cbi.lua' no file '/usr/share/lua/luci/cbi.lua' no file '/usr/share/lua/luci/cbi/init.lua' no file '/usr/lib/lua/luci/cbi.lua' no file '/usr/lib/lua/luci/cbi/init.lua' no file './luci/cbi.so' no file '/usr/lib/lua/luci/cbi.so' no file '/usr/lib/lua/loadall.so' no file './luci.so' no file '/usr/lib/lua/luci.so' no file '/usr/lib/lua/loadall.so' stack traceback: [C]: in function 'require' /usr/lib/lua/luci/dispatcher.lua:1379: in function '_cbi' /usr/lib/lua/luci/dispatcher.lua:1056: in function 'dispatch' /usr/lib/lua/luci/dispatcher.lua:1032: in function 'dispatch' /usr/lib/lua/luci/dispatcher.lua:483: in function </usr/lib/lua/luci/dispatcher.lua:482>

solve:

 opkg update opkg install luci luci-base luci-compat