Incompatible protocol version: client=3.26 vm=4.4 Failed to connect to the VM observatory service at: ws://127.0.0.1:59714/fzc9Mjsvwmg=/ws java.io.IOException: Incompatible protocol version: client=3.26 vm=4.4

 To fix issue just follow the steps given below

Step 1)
Just open your project folder in file explorer. For example I have saved my project(flutter app) under Flutter directory(E:\Flutter\flutter_app) and enter cmd click enter in file directory. Now you will get command prompt like this.

Step 2)
Enter flutter clean and press enter. It deletes the previous build.

Step 3)
Enter flutter run. You will get a screen like this.

Step 4)
Just enter any number from the option based on your wish.

Now your project will run successfully.

If your bug is fixed please mention it in comment. If you have any other suggestions please mention it in comment.

Thank You
Ranjith K