I'm not getting notification in dashboard

Most odd - my simple test works fine...
Have you flushed your browser cache since upgrading ? (Ctrl-Shift-R to reload the page a few times)

[{"id":"94deb552.671b08","type":"ui_toast","z":"c5c7d3cb.0545f","position":"dialog","displayTime":"3","highlight":"","sendall":true,"outputs":1,"ok":"OK","cancel":"","raw":false,"topic":"Authentication Failed","name":"","x":400,"y":620,"wires":[[]]},{"id":"ae671612.5aa628","type":"ui_button","z":"c5c7d3cb.0545f","name":"","group":"4d9f34ff.f0a8dc","order":2,"width":0,"height":0,"passthru":false,"label":"test","tooltip":"","color":"","bgcolor":"","icon":"","payload":"Invalid Password","payloadType":"str","topic":"Authentication Failed","x":170,"y":620,"wires":[["94deb552.671b08","5bf86f94.ee36a"]]},{"id":"4d9f34ff.f0a8dc","type":"ui_group","z":"","name":"Radial Gauges","tab":"58614551.79679c","order":2,"disp":true,"width":3,"collapse":false},{"id":"58614551.79679c","type":"ui_tab","z":"","name":"Widgets","icon":"dashboard","order":2,"disabled":false,"hidden":false}]

I don't know mine is not working after refreshing many time

Do you mean it works at first then stops working after a refresh?

This could be an important clue (e.g. is the socketid old / out of date)

No, It is not working at all