Invisible Recaptcha V2 doesn't work in IE11

[blimmer]

I'm getting this error when using a grecaptcha in IE11:

TypeError: Cannot define property '$jscomp_hidden_0.8984612007357275': object is not extensible
   at f (https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.en_US.c_OM3jNnXiY.O/m=client/rt=j/sv=1/d=1/ed=1/am=QQ/rs=AGLTcCOROd4CcLR3wzaYxHSU787pKavrYQ/cb=gapi.loaded_0:8:63)
   at n.prototype.set (https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.en_US.c_OM3jNnXiY.O/m=client/rt=j/sv=1/d=1/ed=1/am=QQ/rs=AGLTcCOROd4CcLR3wzaYxHSU787pKavrYQ/cb=gapi.loaded_0:9:171)
   at g (https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.en_US.c_OM3jNnXiY.O/m=client/rt=j/sv=1/d=1/ed=1/am=QQ/rs=AGLTcCOROd4CcLR3wzaYxHSU787pKavrYQ/cb=gapi.loaded_0:13:250)
   at f.prototype.set (https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.en_US.c_OM3jNnXiY.O/m=client/rt=j/sv=1/d=1/ed=1/am=QQ/rs=AGLTcCOROd4CcLR3wzaYxHSU787pKavrYQ/cb=gapi.loaded_0:11:148)
   at c.prototype.add (https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.en_US.c_OM3jNnXiY.O/m=client/rt=j/sv=1/d=1/ed=1/am=QQ/rs=AGLTcC

I can't figure out what's causing this problem. Chrome, Firefox, Edge, etc. do not have this problem.

Any suggestions on how to debug it?

[blimmer]

Hmm, is it possible that there are name conflicts with "WeakMap"?

[blimmer]

Or, is it possibly related to this issue? google/closure-compiler#3080

[blimmer]

It looks like this is actually potentially an issue with the framework, Ember.js that I'm using. Here's a bug report on their end: emberjs/ember.js#17218

However, is there something that recaptcha should consider to work around this problem?

[rowan-m]

Closing old issues that are not related to the PHP client code.