I found a conflict between Vimeo’s player.js and Meteor 1.6 in Explorer 11.
With the Vimeo script included in the header in a script tag, the application will not load in IE11. The error reported in the console is
The core-js npm package could not be found in your node_modules directory. Please run the following command to install it: meteor npm install --save core-js
This error is coming from .meteor/local/build/programs/web.browser/packages/ecmascript-runtime-client.js. However this error is not accurate. When the text is removed from the catch statement and replaced with the error coming from the browser, it reads
Error: Out of stack space
Which led me to this issue. I assume that there is some conflict with polyfills in the Vimeo script and the ones in Meteor. Removing player.js resolves the errors.