errors in a vpn app flutter

[NegarTavakol]

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hi there , I'm trying to write a Free Vpn App in flutter . I am Iranian as you know Iran has very Strong filtering so I can not use applications like whats app for talking with my family so I decided to write a Vpn App for it ,cause every day new VpnApps suspended in Iran , I have some issue in my app like :
The following MissingPluginException was thrown while activating platform stream on channel
vpnStage:
MissingPluginException(No implementation found for method listen on channel vpnStage)

When the exception was thrown, this was the stack:
#0 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:332:7)

#1 EventChannel.receiveBroadcastStream. (package:flutter/src/services/platform_channel.dart:676:9)

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Another exception was thrown: MissingPluginException(No implementation found for method listen on channel vpnStatus)
I try to fix them but my knowledge is weak and need to getting help to fix them . Is there any person to solve or guide me to fix them?

[queenofcorgis]

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