When I run the program again, it still can't work. Then I started Baidu. A friend said to run ADB kill server under DOS first (you must configure your ADB path in the environment variable or enter the directory of adb.exe), Then in the ADB start server, when I run the ADB start server, DOS will display the following information If those info doesn't appear you should install Android Studio correctly. Then you can kill the adb server and start the adb serveer. 1.to kill--->> adb kill-server. 2.to start-->> adb start-server. All done. just need to exit Android Studio and once again run it as administrator :D. I haven't seen any solution as mine but I think this is There are a couple of solutions depending on what exactly is causing the problem. So, just follow the following steps. Step 1:-Close Android-Studio.Step 2:-Open Command prompt or win + r, type cmd and press Enter.Step 3:-Navigate to your platform-tools, in most of the cases the location is: C:Users[user]AppDataLocalAndroidandroid-sdkplatform-tools Hi guys. I started to learn (The Complete 2020 Flutter Development Bootcamp with Dart). Installed Flutter and Android Studio as well. UsersAdministratorAppDataLocalAndroidSdkplatform-toolsadb.exe start-server' failed -- run manually if necessary Output of the command: 'C:Users*****AppDataLocalAndroidSdkplatform-toolsadb If you are emulating with Genymotion to preven conflicts between Genymotion's ADB and SDK's ADB because both of them use the same port, I recommend always set up ADB Genymotion to use the ADB SDK, in that way you can avoid issues of incompatible (i.e. ddms: 'adb.exe,start-server' failed — run manually if necessary, Android Studio). After restarting Unity some times, Plugging in and out my Android Device and some research on the Internet, I was finally able to Solve the problem. What was causing it was a conflict between the ADB.exe from Xamarin for Visual Studio and the ADB.exe from Unity itself. When trying to create the Unity Build, at the same time, I had another End the process, enter taskkill/F/T/im your process name, such as adb.exe, as shown in the figure below. When reconnecting the mobile phone, you will find that the program is running . Similar Posts: Android ADB server didn't ACK * failed to start d [Solved] VUE npm run devevents.js:160 throw er; // Unhandled 'error' event listen EADDRIN… 1. Sometimes when you use the ADB tool to connect to an Android device or simulator, you will be prompted with such a prompt as ADB Server Version (31) doesn't match this client (41). As shown in the picture. The literal meaning of the prompt is that the current client version 41 does not match the server version. The current version is too high. I'm not sure if Windows is blocking the program or if it has something to do with Android Studio. I can run ADB manually. Program FilesUnityHubEditor9.2.3f1EditorDataPlaybackEnginesAndroidPlayerSDKplatform-toolsadb.exe" start-server doesn't match this client (40); killing could not read ok from ADB Server * failed to