Sdkmanager "Error: Could not find or load main class com.android.sdklib.tool.sdkmanager.SdkManagerCli" on Windows

I am trying to install Flutter without Android Studio and here is what I did:

• Installed Java 8
• Installed and Unzipped Flutter SDK to C:\src.
• Installed and Unzipped Android Command-line tools (sdkmanager) to C:\Android.
• Added the environment variables (ANDROID_HOME: C:\Android)

Now when I try to run sdkmanager to install Android SDK, I get this error:

"Error: Could not find or load main class com.android.sdklib.tool.sdkmanager.SdkManagerCli"

I have tried reinstalling Flutter sdk and the sdkmanager with no luck.

Here is Flutter Doctor's output:

sdkmanager error:

1. Download the SDK tools ZIP (Under Command Line Tools in https://developer.android.com/studio).
2. Unzip using 7zip. Avoid using the default windows extractor - that doesn't do the extraction correctly.
3. After unzipping using 7zip, place the contents into the sdk folder (C:\Users\<username>\AppData\Local\Android\Sdk\tools\bin and C:\Users\<username>\AppData\Local\Android\Sdk\lib) and run sdkmanager on command prompt.