Hi there, May I know what polymer version are you using? 'Cause the error message seems new to me. If you don't mind, please copy and paste your `index.html` on CodePen or JSFiddle. Thanks.
Best Regards, Cayter Follow Polymer on Google+: plus.google.com/107187849809354688692 --- You received this message because you are subscribed to the Google Groups "Polymer" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/polymer-dev/d30b3674-7253-476c-91c0-7af6e45cf31c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
