WiFi Error with SoftUART

[Chathuranga]

NodeMCU 3.0.0.0 built on nodemcu-build.com provided by frightanic.com
branch: dev
commit: af689a6
release:
release DTS: 202104250545
SSL: false
build type: float
LFS: 0x40000 bytes total capacity
modules: file,gpio,mqtt,net,node,rtctime,sjson,sntp,softuart,tmr,uart,wifi
build 2021-04-25 12:14 powered by Lua 5.1.4 on SDK 3.0.1-dev(fce080e)
cannot open init.lua:

code:

wifi.setmode(wifi.STATION)
wifi.sta.config({ssid="SCW_Wireless",pwd="ninenine99"})
wifi.sta.connect()
tmr.create():alarm(1000, 1, function(t)
    if wifi.sta.getip() == nil then
        print("IP unavailable, Waiting...",wifi.sta.status())
    else
        t.stop(1)
        print("Config done, IP is "..wifi.sta.getip())
    end
end)

output:

IP unavailable, Waiting...	1
IP unavailable, Waiting...	1
IP unavailable, Waiting...	1
IP unavailable, Waiting...	1
IP unavailable, Waiting...	1
IP unavailable, Waiting...	1
IP unavailable, Waiting...	1
IP unavailable, Waiting...	1
IP unavailable, Waiting...	1
IP unavailable, Waiting...	1
IP unavailable, Waiting...	4
IP unavailable, Waiting...	4
IP unavailable, Waiting...	4
IP unavailable, Waiting...	4
IP unavailable, Waiting...	4
IP unavailable, Waiting...	4
IP unavailable, Waiting...	4
IP unavailable, Waiting...	4
IP unavailable, Waiting...	4

wifi won't connect most of the time... even if connects it get disconnect or no internet connection.
with out even initializing softuart.