I have the same problem! Did you figure it out?
I checked the source files again and WikitudePlugin.js defines a function called `requestAccess` in line 69 and index.js tries to call this function in line 84. Can you confirm that this is the same for you in the final project that you're launching? Maybe some files are not updated correctly on Windows (Staging www folder and www folder).
I'm a step further now.
I disabled the 2 'sed' commands in the generator file. One line for minSDK version and one line for the license key. I manually updated the minSDK version and license keys in the 3 WikitudePlugin.js files.
The app now runs and gets me to the sample overview screen.
I now get this error:
"Error in Success callbackId: WikitudePlugin1256307210 : TypeError: app.wikitudePlugin.requestAccess is not a function"
Can you help me with that?
I'm using jdk1.8.0_121 with cordova (phonegap)