# Invalid Charcter SCRIPT1014 IE11 - Polyfill help

**URL:** <https://discourse.aurelia.io/t/invalid-charcter-script1014-ie11-polyfill-help/2622>\
**Category:** Help Requests\
**Created:** [June 7, 2019, 5:59pm UTC](https://discourse.aurelia.io/t/invalid-charcter-script1014-ie11-polyfill-help/2622 "2019-06-07T17:59:29Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![dmbarth](https://yyz1.discourse-cdn.com/flex027/user_avatar/discourse.aurelia.io/dmbarth/32/913_2.png) [@dmbarth](https://discourse.aurelia.io/u/dmbarth)\
**Post date:** [June 7, 2019, 5:59pm UTC](https://discourse.aurelia.io/t/invalid-charcter-script1014-ie11-polyfill-help/2622/1 "2019-06-07T17:59:29Z")

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I’ve been struggling to get our current application to work on IE10 and IE11. I am getting all sorts of vendor-bundle script errors and syntax errors. Currently, I’m stuck on the aurelia-validation package throwing a invalid character error when IE tries to read string literals.

Currently, I have @babel/polyfill/browser.js in the aurelia.json file prepend’ed. Any help here would be great.

Thanks!

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**Author:** ![bigopon](https://yyz1.discourse-cdn.com/flex027/user_avatar/discourse.aurelia.io/bigopon/32/18_2.png) [@bigopon](https://discourse.aurelia.io/u/bigopon)\
**Post date:** [June 7, 2019, 6:42pm UTC](https://discourse.aurelia.io/t/invalid-charcter-script1014-ie11-polyfill-help/2622/2 "2019-06-07T18:42:10Z")

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Can you help paste the error?

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**Author:** ![dmbarth](https://yyz1.discourse-cdn.com/flex027/user_avatar/discourse.aurelia.io/dmbarth/32/913_2.png) [@dmbarth](https://discourse.aurelia.io/u/dmbarth)\
**Post date:** [June 7, 2019, 7:04pm UTC](https://discourse.aurelia.io/t/invalid-charcter-script1014-ie11-polyfill-help/2622/3 "2019-06-07T19:04:06Z")

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Well, it seems, to have resolved itself somehow. Not exactly sure what I did. Maybe deleting the package-lock.json and reinstalling packages helped? Idk.

Thanks for the quick response! I’ll reply here if it pops up again.

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**Author:** ![arnederuwe](https://yyz1.discourse-cdn.com/flex027/user_avatar/discourse.aurelia.io/arnederuwe/32/737_2.png) [@arnederuwe](https://discourse.aurelia.io/u/arnederuwe)\
**Post date:** [June 13, 2019, 2:10pm UTC](https://discourse.aurelia.io/t/invalid-charcter-script1014-ie11-polyfill-help/2622/4 "2019-06-13T14:10:16Z")

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It was probably caused by this: [https://github.com/aurelia/cli/issues/1033](https://github.com/aurelia/cli/issues/1033)  
I experienced the same issues in IE, it has since been fixed 🙂