System error in log when viewing mashup created and locks up


#1

I am using https://ptcu-thingworx83-ui.portal.ptc.io/Thingworx/Composer/Apps/Composer/ for course IoT UI Development with Thingworx 8.3 and I am getting this error when viewing the mashup I created.

09:14:14 ERROR - paper cleanup error: TypeError: Cannot read property ‘clear’ of undefined
**09:14:14 ERROR - An error occurred while calling gauge::afterRender, Id = “gauge-27”. **
Exception: redrawHandler.on is not a function
09:14:14 WARN - trying to set a parameter that is not defined: “forceClose”. Ignoring it

I have reviewed the configuration video twice and does not appear to be a configuration issue. I am using Chrome browser and my Java version is up to date.