Emulator doesn't work

Hello everyone,
I've installed Appinventor Emulator following all the instructions posted on the website, including the installation as the Admin. But when I run the emulator I receive the following message:error_emulator

What am I doing wrong?

thanks a lot

Depending on your platform, you should be able to ignore this error. The version check functionality was introduced to the emulator software in version 2.4. You may want to consider upgrading the package on your computer. There are also newer versions in beta you may want to try: