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Running mongoose os on ESP 8266 (ESP-01) gives an exception 28

Hi All i have successfully flashed the mongoose to esp 01 then i get this

mos --esp-baud-rate=115200 flash esp8266-1M
Fetching https://github.com/mongoose-os-apps/demo-js/releases/download/1.25/demo-js-esp8266-1M.zip...
Loaded demo-js/esp8266 version 1.0 (20180125-013314/???)
Using port /dev/ttyACM0
Opening /dev/ttyACM0 @ 115200...
Connecting to ESP8266 ROM, attempt 1 of 10...
Connected, chip: ESP8266EX
Running flasher @ 115200...
Flasher is running
Flash size: 1048576, params: 0x0220 (dio,8m,40m)
Deduping...
2736 @ 0x0 -> 0
4096 @ 0x7000 -> 0
778512 @ 0x8000 -> 0
131072 @ 0xdb000 -> 0
4096 @ 0xfb000 -> 0
128 @ 0xfc000 -> 0
Verifying...
2736 @ 0x0
4096 @ 0x7000
778512 @ 0x8000
131072 @ 0xdb000
4096 @ 0xfb000
128 @ 0xfc000
Booting firmware...
All done!
then when i tried to set the wifi data using the wifi command it failed .i tried both "mos --esp-baud-rate=115200 wifi WIFINAME WIFIPASS" and "mos wifi WIFINAME WIFIPASS"
Using port /dev/ttyACM0
Getting configuration...
Error: write /dev/ttyACM0: file already closed

So i opened the serial console using "mos console" following exception appears.
[Feb 4 18:33:07.449] Fatal exception (28):
[Feb 4 18:33:07.449] epc1=0x401000ab, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00004028, depc=0x00000000

any idea how to fix this ?

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