try to fix can not start from luci

luasrc/model/cbi/AdGuardHome/base.lua

@@ -2,7 +2,7 @@ require("luci.sys")
 require("luci.util")
 local fs=require"nixio.fs"
 local uci=require"luci.model.uci".cursor()
-
+require("io")
 local configpath=uci:get("AdGuardHome","AdGuardHome","configpath")
 if (configpath==nil) then
 configpath="/etc/AdGuardHome.yaml"

luasrc/model/cbi/AdGuardHome/manual.lua

@@ -2,6 +2,7 @@ local m, s, o
 local NXFS = require "nixio.fs"
 local uci=require"luci.model.uci".cursor()
 local sys=require"luci.sys"
+require("io")
 m = Map("AdGuardHome")
 
 local escconf = uci:get("AdGuardHome","AdGuardHome","configpath")