In this particular case, since the screenshots show the old emulator, the most likely culprit is that the dialog that requests an update to the companion has been ignored. Whenever someone gets an error where the package "com.google.appinventor.components.runtime" is repeated, this indicates that they have an old companion before extension support was added. We probably should make it so that dialog cannot be bypassed when the version number is older than a certain value...
Edit: To follow up, we strongly recommend that you install the newer emulator package for Windows since the old version will likely stop working in January of next year if you use Google Chrome.